Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manufacture method of high-strength and high-modulus low-shrinkage polyester industrial yarn is provided.The selection of cooling condition and control are the significant effects factors in polyester industrial yarn forming process, in melt spinning process, the melt thread that melt is extruded from spinnerets, through the cooling solidified forming of cooling air, form the preliminary aggregated structure of fiber, the quality being shaped directly affects the spinnability of fiber and the quality of finished product, and the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc. are all had to considerable influence.The present invention, by selection and the control of cooling condition, provides a kind of manufacture method of high-strength and high-modulus low-shrinkage polyester industrial yarn.
The manufacture method of a kind of high-strength and high-modulus low-shrinkage 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 cutting into slices for high gluing of obtaining by solid-phase tack producing, and its inherent viscosity is 1.0 ~ 1.2dl/g.Because its molecular weight distribution is narrower, number-average molecular weight is higher, and after stretching, resulting fibre strength is higher.Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts; Reduce to greatest extent orientation and the crystallization of as-spun fibre, improve as far as possible after-drawing than being the basis of manufacturing high-strength and high-modulus low-shrinkage polyester industrial yarn.Spinning speed and cooling condition are the principal elements that affects as-spun fibre orientation, and crystallization is mainly subject to the impact of the type of cooling and technique; When melt is extruded from spinnerets, the temperature of melt is very high, a little less than thread is highly brittle, is unable to undergo the impact of any air-flow, and meanwhile, too fast cooling meeting causes fiber, and radially skin-core structure and the curling large molecule of generation of cross section increase.In order to control orientation and the crystallization of as-spun fibre, annealer (a kind of ring-type heater) is set in the production of industrial yarn, to guarantee that as-spun fibre is even, Slow cooling; Under annealer, be pre-cooler, pre-cooler is a kind of for passive outer shroud precooling, and 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 strand is carried out cooling of air natural, and passive outer loop device is hollow out endless belt, and precooling is played very important effect to falling low-fiber irregularity; Under pre-cooler, be without wind apparatus, without wind apparatus, it is a kind of ring type structure, its effect is to form the calm region that surrounding impales, zone of silence is cooling between pre-cold-peace quenching, zone of silence moves down the quench region of tow, the buffer area that increases tow, can make the cooling more even of tow.By the technique of cooling condition, adjust as-spun fibre in the temperature of spinning in journey, to reach, reduce the orientation of as-spun fibre and the object of crystallization, finally obtain high-quality fiber.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 260 ~ 300 ℃, and slow cooling district exit strand temperature is 280 ~ 285 ℃.
Described precooling is the precooling of passive outer shroud successive; Described passive outer shroud successive precooling refers to flow through passive outer shroud successive device and then carry out cooling to strand of air natural.
Described passive outer shroud successive device is hollow out successive endless belt, and described hollow out successive endless belt is circumferentially furnished with narrow slit; In comprising the cross section of described narrow slit, the total length of described narrow slit is 60～90% of described hollow out successive endless belt girth; The width of described narrow slit axially successively decreases from top to bottom successively along described hollow out successive endless belt, and the Breadth Maximum of described narrow slit is 5～8mm, and minimum widith is 2～4mm; The height of described hollow out successive endless belt is 60～80mm;
Described precooling refers to that tow ambient temperature is 160 ~ 260 ℃, and exit, pre-cooling zone strand temperature is 250 ~ 260 ℃.
Described zone of silence is cooling refers to that tow ambient temperature is 100 ~ 160 ℃, and zone of silence exit strand temperature is 220 ~ 230 ℃.
The wind-warm syndrome of described quenching is 15～30 ℃.
The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio≤1.5%, fracture strength > 7.7cN/dtex, fracture strength CV value≤2.5%, modulus >=100N/dtex, extension at break is 19.0 ± 1.5%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.0 ± 0.5%.
What often industrial yarn was emphasized is fracture strength and extension at break, and ignores modulus and inotropic control, and cooling condition is to affect modulus and inotropic principal element.
As preferred technical scheme:
The manufacture method of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn as above, described slow cooling is highly 250～300mm.
The manufacture method of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn as above, the cooling height of described zone of silence is 200～300mm.
By controlling the height of slow cooling, precooling, zone of silence, guarantee the time of staying of tow, reach and reduce the temperature of tow and the object that reduces the tow temperature difference radially, to obtain the polyester industrial yarn of low line density deviation ratio.
The manufacture method of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn as above, 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.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 high-strength and high-modulus low-shrinkage 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 high-strength and high-modulus low-shrinkage 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 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
The manufacture method of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn as above, high-tenacity low-elongation polyester industrial yarn filament number 2dtex～8dtex that described method makes.
The basic principle of the manufacture method of a kind of high-strength and high-modulus low-shrinkage 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 superperformance polyester industrial yarn, in the time of must making to solidify, the internal stress of strand is low especially, thereby molecular preorientation degree is reduced.By add a kind of annealing device of heating under spinnerets, melt thread is gone out after spinnerets not by quenching, but cooling lentamente, namely make cooldown rate reduce, extend melt district, solidification point is moved down, thereby reduced the tension force of spinneret draft, the pre-orientation degree of fiber is reduced, can play slow cooling effect and reduce core-skin phenomenon, improve single tow cooling uniformity, be beneficial to drafting multiple and improve, can obtain the fiber of high-tenacity.Annealing device guarantees that in this region, air has sufficiently high temperature, to control the decrease speed of strand temperature, improves the tensile property of fiber.
Tow enters cooled region through slow cooling district, and the tow at the blast points place of the top is still a kind of inhomogeneous state of cooling cold outside and hot inside.So increase zone of silence, can further reduce the transversal temperature difference of tow, reduced the strand causing because of quenching birefringence surperficial and strand inner core poor, therefore alleviate and the core-skin layer fibre structure forming, the quench region of tow is moved down, the buffer area that increases tow, can make the cooling more even of tow.
Along with adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of fiber and then moves down.But because the fiber number of industrial yarn is larger, its specific area is less, as-spun fibre is difficult for heat radiation, cooldown rate is slack-off, fiber is at the overstand of 180～200 ℃ of crystal regions, thereby cause as-spun fibre degree of crystallinity excessive, form the concentration of local of tensile stress, in production, can cause lousiness and broken end.Meanwhile, because the solidification point of fiber and then moves down, tow shake aggravation, causes this section easily to produce unsettled air-flow, has aggravated the shake of tow, melt is gone out after spinnerets extremely unstable, easily produces head silk, and spinning technique is under some influence.
Between annealing device and zone of silence, introduce pre-cooler, first be the position that has guaranteed the solidification point of as-spun fibre, the solidification point that has reduced fiber moves down the irregularity that produced tow shake brings, next is effectively control and reduced fiber near the time of staying 180～200 ℃, thereby avoided that as-spun fibre degree of crystallinity is excessive have been caused stretching irregular, what guarantee to stretch carries out smoothly.
Beneficial effect:
1, pre-cooling zone adopts the hollow out endless belt that has certain altitude and cross wind area, reduces air stream through the disturbance to tow, reduces the temperature of tow, has guaranteed carrying out smoothly of subsequent technique.
2,, by the introducing of pre-cooler, the solidification point that has reduced fiber moves down the irregularity that produced tow shake brings, and line density deviation ratio is controlled in lower scope.
3, the introducing by pre-cooler, to reach the object of the degree of orientation that reduces as-spun fibre, finally obtains high-quality fiber.
4, by 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 high-strength and high-modulus low-shrinkage polyester industrial yarn of the inventive method manufacture to have that fracture strength is high, modulus is large, extension at break is low, line density deviation ratio is low, the rational advantage of dry-hot shrinkage, can meet well the needs of application.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.0dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 260 ℃, and strand temperature is 280 ℃; Described slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 160 ℃, and strand temperature is 250 ℃.
Described zone of silence is cooling refers to that tow ambient temperature is 100 ℃, and strand temperature is 220 ℃; The cooling height of described zone of silence is 200mm.
The wind-warm syndrome of described quenching is 15 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15 ℃, and humidity is 60%, and wind speed is 0.2m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 20 ℃, speed is 2100m/min, the temperature of second roller is 72 ℃, and speed is 2260m/min, and the temperature of the 3rd roller is 210 ℃, speed is 3250m/min, the 4th roll temperature is 150 ℃, 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 2900m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 2dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.5%, fracture strength is 7.8cN/dtex, and extension at break is 17.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 6.7%.
Embodiment 2
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.2dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 300 ℃, and strand temperature is 285 ℃; Described slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 ℃, and strand temperature is 260 ℃.
Described zone of silence is cooling refers to that tow ambient temperature is 160 ℃, and strand temperature is 230 ℃; The cooling height of described zone of silence is 300mm.
The wind-warm syndrome of described quenching is 30 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 22 ℃, speed is 1900m/min, the temperature of second roller is 70 ℃, and speed is 2280m/min, and the temperature of the 3rd roller is 215 ℃, speed is 3400m/min, the 4th roll temperature is 148 ℃, and speed is 3150m/min, and the speed of the 5th roller is 2875m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2875m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 10dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1%, fracture strength is 8.5cN/dtex, and extension at break is 19%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.1%.
Embodiment 3
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.2dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 280 ℃, and strand temperature is 283 ℃; Described slow cooling is highly 270mm.
Described precooling refers to that tow ambient temperature is 220 ℃, and strand temperature is 255 ℃.
Described zone of silence is cooling refers to that tow ambient temperature is 130 ℃, and strand temperature is 225 ℃; The cooling height of described zone of silence is 250mm.
The wind-warm syndrome of described quenching is 20 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 20 ℃, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 23 ℃, speed is 2100m/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 152 ℃, and speed is 3112m/min, and the speed of the 5th roller is 2970m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2970m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 6dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.3%, fracture strength is 8.1cN/dtex, and extension at break is 19%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 6.9%.
Embodiment 4
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.2dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 270 ℃, and strand temperature is 282 ℃; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 180 ℃, and strand temperature is 253 ℃; Described precooling is highly 60mm.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 loop device is hollow out endless belt, and it crosses wind Area Ratio is 20%, is highly 60mm; Described wind Area Ratio excessively refers to the ratio of the area of the area of air stream warp and the windward side of passive outer loop device.
Described zone of silence is cooling refers to that tow ambient temperature is 120 ℃, and strand temperature is 222 ℃; The cooling height of described zone of silence is 230mm.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 18 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 18 ℃, and humidity is 65%, and wind speed is 0.3m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 19 ℃, speed is 3500m/min, the temperature of second roller is 85 ℃, and speed is 4850m/min, and the temperature of the 3rd roller is 210 ℃, speed is 6500m/min, the 4th roll temperature is 148 ℃, and speed is 5900m/min, and the speed of the 5th roller is 6400m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6400m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 8dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.2%, fracture strength is 7.9cN/dtex, and extension at break is 18.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 6.8%.
Embodiment 5
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.0dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 300 ℃, and strand temperature is 285 ℃; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 250 ℃, and strand temperature is 260 ℃; Described precooling is highly 80mm.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 loop device is hollow out endless belt, and it crosses wind Area Ratio is 50%, is highly 80mm; Described wind Area Ratio excessively refers to the ratio of the area of the area of air stream warp and the windward side of passive outer loop device.
Described zone of silence is cooling refers to that tow ambient temperature is 160 ℃, and strand temperature is 230 ℃; 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 20 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 20 ℃, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 26 ℃, speed is 3300m/min, the temperature of second roller is 86 ℃, and speed is 5200m/min, and the temperature of the 3rd roller is 215 ℃, speed is 6700m/min, the 4th roll temperature is 147 ℃, and speed is 6500m/min, and the speed of the 5th roller is 6400m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6400m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 9dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.3%, fracture strength is 8.5cN/dtex, and extension at break is 20.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.2%.
Embodiment 6
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.2dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 280 ℃, and strand temperature is 283 ℃; Slow cooling is highly 270mm.
Described precooling refers to that tow ambient temperature is 220 ℃, and strand temperature is 255 ℃; Described precooling is highly 70mm.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 loop device is hollow out endless belt, and it crosses wind Area Ratio is 35%, is highly 70mm; Described wind Area Ratio excessively refers to the ratio of the area of the area of air stream warp and the windward side of passive outer loop device.
Described zone of silence is cooling refers to that tow ambient temperature is 130 ℃, and strand temperature is 225 ℃; 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 30 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 20 ℃, speed is 3550m/min, the temperature of second roller is 83 ℃, and speed is 5300m/min, and the temperature of the 3rd roller is 218 ℃, speed is 6800m/min, the 4th roll temperature is 152 ℃, and speed is 6100m/min, and the speed of the 5th roller is 5900m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5900m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 5dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.5%, fracture strength is 8.2cN/dtex, and extension at break is 19.3%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7%.
Embodiment 7
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.0dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 260 ℃, and strand temperature is 280 ℃; Described slow cooling is highly 280mm.
Described precooling refers to that tow ambient temperature is 160 ℃, and strand temperature is 250 ℃.
Described zone of silence is cooling refers to that tow ambient temperature is 100 ℃, and strand temperature is 220 ℃; The cooling height of described zone of silence is 250mm.
The wind-warm syndrome of described quenching is 20 ℃; Described quenching is ring quenching, and the temperature that its technique is dried for ring is 20 ℃, 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 24 ℃, speed is 2100m/min, the temperature of second roller is 75 ℃, and speed is 2265m/min, and the temperature of the 3rd roller is 218 ℃, speed is 3300m/min, the 4th roll temperature is 151 ℃, and speed is 3125m/min, and the speed of the 5th roller is 2875m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2875m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 3dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.4%, fracture strength is 7.9cN/dtex, and extension at break is 19.2%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.5%.
Embodiment 8
A manufacture method for high-strength and high-modulus low-shrinkage 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 1.1dl/g.
Described coolingly comprise successively slow cooling, precooling, zone of silence is cooling and quenching four parts.
Described slow cooling refers to that tow ambient temperature is 270 ℃, and strand temperature is 282 ℃; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 180 ℃, and strand temperature is 253 ℃; Described precooling is highly 60mm.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 loop device is hollow out endless belt, and it crosses wind Area Ratio is 30%, is highly 60mm; Described wind Area Ratio excessively refers to the ratio of the area of the area of air stream warp and the windward side of passive outer loop device.
Described zone of silence is cooling refers to that tow ambient temperature is 120 ℃, and strand temperature is 222 ℃; The cooling height of described zone of silence is 300mm.Described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
The wind-warm syndrome of described quenching is 30 ℃; Described quenching is ring quenching, and the temperature that its technique is dried for ring is 30 ℃, 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 26 ℃, speed is 3550m/min, the temperature of second roller is 85 ℃, and speed is 4900m/min, and the temperature of the 3rd roller is 209 ℃, speed is 6750m/min, the 4th roll temperature is 153 ℃, and speed is 6100m/min, and the speed of the 5th roller is 6200m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6200m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 4dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio is 1.3%, fracture strength is 8.2cN/dtex, and extension at break is 19%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.2%.