CN102787378B - Manufacturing method for high-strength low-elongation type dacron industrial yarn - Google Patents
Manufacturing method for high-strength low-elongation type dacron industrial yarn Download PDFInfo
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Abstract
The invention relates to a manufacturing method for high-strength low-elongation type dacron industrial yarn. The manufacturing method comprises compress flows of hyper-viscous melting of a dacron raw material, metering, yarn spraying, cooling, oiling, drawing, heat setting and winding forming. An adopted dacron slice is a hyper-viscous slice obtained by solid phase tackifying. A cooling device sequentially comprises slow cooling, pre-cooling, windless region cooling and air-blowing cooling, wherein the pre-cooling is initiative outer ring pre-cooling and refers to enabling hot air to be conveyed and flow through an initiative outer ring device so as to cool yarn strips. The initiative outer ring device is a hollow annular belt, the air passing area ratio of the initiative outer ring device is 20-50%, and the height is 30-80mm. The temperature of the hot air is 60-80 DEG C, the humidity is 60-80%, and the conveying speed is 0.2-0.8m/s. The obtained dacron filament has the advantages of being high in breaking strength, low in breaking elongation and linear density deviation rate and reasonable in dry heat shrinkage rate, and can meet the application requirements well.
Description
Technical field
The present invention relates to a kind of production method of polyester industrial yarn, especially relate to a kind of High-strength low-elongation polyester industrial filament manufacture method, belong to dry polyester industrial yarn manufacture field.
Background technology
Terylene is since appearance, and industrial use achieves huge development, and polyester industrial yarn refers to the terylene industrial long filament at high-strength, thick dawn.Polyester industrial yarn is high with its fracture strength, initial modulus is high, percentage elongation is low, the excellent physical and mechanical properties such as resistance to impact is good, industrially be widely used, can be used as the framework material of the rubber such as tire cord, cable envelope curve, conveyer belt and plastic coating fabric, also can do rope, safety belt for vehicle, conveyer belt, tarpaulin, coated fabric, geotextile etc.
High-strength low-elongation polyester industrial filament, also known as common standard type polyester industrial yarn, is the large kind of one in polyester industrial yarn.There is high strength, low elongation, high-modulus, dry-hot shrinkage comparatively high.Its good combination property, of many uses, be at present mainly used as tire cord and conveyer belt, the warp of canvas and safety belt for vehicle, conveyer belt.In the preparation process of polyester industrial yarn, cooling forming process determines the accumulation shape of as-spun fibre, by the quality, particularly line density deviation ratio of the tensile property and finished silk that affect as-spun fibre.
The selection of cooling condition and control are most important influence factors in polyester industrial yarn forming process, and it all has considerable influence to the degree of orientation, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc. of fiber.In order to obtain the polyester industrial yarn of superperformance, under spinnerets, usually add a kind of annealing device of heating, tow is cooled lentamente, install zone of silence device simultaneously additional, increase the buffer area of tow, cool tow more equably.But along with adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of as-spun fibre and then moves down, tow shake aggravation, cause easily producing unstable air-flow, exacerbate the shake of tow, unstable after making melt go out spinnerets, spinning technique is under some influence, the time of staying of as-spun fibre near crystal region is longer simultaneously, thus causes as-spun fibre degree of crystallinity excessive, can cause lousiness and broken end in production, fineness-unevenness rate raises, decrease in yield.
Existing research shows, in the preparation process of current High-strength low-elongation polyester industrial filament, cooling procedure is all not ideal enough.Chinese patent CN 101824664A describes a kind of manufacture method of high tenacity polyester filament, and adopt ring quenching, the fineness-unevenness rate of the polyester industrial yarn obtained is higher.Patent CN 03113412.2 describes the manufacture method of sewing thread with high-strength flatness polyester filament, and its cooling step is after drawing-off, HEAT SETTING, and the instability due to solidification point causes tow shake to cause fiber linear density irregularity higher.
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 low-elongation polyester industrial filament 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 stream that melt is extruded from spinnerets, through cooling air cooling solidified forming, form the preliminary aggregated structure of fiber, the quality be shaped directly affects the spinnability of fiber and the quality of finished product, all has considerable influence to the degree of orientation, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc. of fiber.The present invention passes through selection and the control of cooling condition, provides a kind of manufacture method of High-strength low-elongation polyester industrial filament.
The manufacture method of a kind of High-strength low-elongation polyester industrial filament of the present invention, its technological process is high sticky melting polyester raw material, and------------oiling,---stretch spray silk---HEAT SETTING---winding shaping in cooling in metering; The terylene chips adopted is the sticky section of height obtained by solid-phase tack producing, and its inherent viscosity is 1.0 ~ 1.2dl/g.Because its molecular weight distribution is narrower, number-average molecular weight is higher, and the fibre strength obtained after stretching is higher.Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively; Reducing orientation and the crystallization of as-spun fibre to greatest extent, improving after-drawing as far as possible than being the basis manufacturing High-strength low-elongation polyester industrial filament.Spinning speed and cooling condition are the principal elements affecting as-spun fibre orientation, and crystallization is then 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, and thread is very fragile, is unable to undergo the impact of any air-flow, meanwhile, too fast cooling can cause fiber radially the skin-core structure of cross section generation and curlingly macromolecularly to increase.In order to control orientation and the crystallization of as-spun fibre, the production of industrial yarn arranges annealer (a kind of ring-type heater), to ensure that as-spun fibre is even, Slow cooling; Be pre-cooler under annealer, this pre-cooler is a kind of initiatively outer shroud precooling, and described precooling is the tow for the as-spun fibre being in molten condition.Initiatively outer shroud precooling refers to and hot-air conveying is flowed through the outer loop device of active and then cools strand, and initiatively outer loop device is hollow out endless belt, and precooling serves very important effect to falling low-fiber irregularity; Being without wind apparatus under pre-cooler, is a kind of ring type structure without wind apparatus, and its effect is the calm wind area that formation surrounding impales, zone of silence cooling is between pre-cold-peace quenching, zone of silence makes the quench region of tow move down, and increases the buffer area of tow, makes the cooling of tow more even.Adjust as-spun fibre by the technique of cooling condition and spinning the temperature in journey, reduce the orientation of as-spun fibre and the object of crystallization to reach, the final fiber obtaining high-quality.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 260 ~ 300 DEG C, and slow cooling district exit strand temperature is 280 ~ 285 DEG C.
Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to and hot-air conveying is flowed through the outer loop device of active and then cools strand.The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 20 ~ 50%, is highly 30 ~ 80mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active; The temperature of described hot-air is 60 ~ 80 DEG C, humidity 60 ~ 80%, transporting velocity 0.2 ~ 0.8m/s.
Described precooling refers to that tow ambient temperature is 180 ~ 260 DEG C, and exit, pre-cooling zone strand temperature is 260 ~ 265 DEG C.
Described zone of silence cooling refers to that tow ambient temperature is 130 ~ 180 DEG C, and zone of silence exit strand temperature is 240 ~ 250 DEG C.
The wind-warm syndrome of described quenching is 15 ~ 30 DEG C;
The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio≤1.5%, fracture strength >=8.3cN/dtex, fracture strength CV value≤2.5%, extension at break is 10.0 ± 1.5%, extension at break CV value≤7.0%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 10.0 ± 0.5%.
Often industrial yarn is it is emphasized that fracture strength and extension at break, and ignores the control to line density deviation ratio, and fineness-unevenness rate is irregular on intensity, it is very large to extend irregular impact, and cooling condition is the principal element of effect string density variation rate.
As preferred technical scheme:
The slow cooling described in manufacture method of a kind of High-strength low-elongation polyester industrial filament as above is highly 250 ~ 300mm.
The manufacture method of a kind of High-strength low-elongation polyester industrial filament as above, described zone of silence cooling is highly 200 ~ 300mm.
Described hollow out ladder endless belt is the through hole of uniform diameter 5 ~ 7mm on endless belt.Pre-cooling zone adopts hollow out endless belt, and selects certain altitude and cross wind area mainly in order to reduce the disturbance of air stream to tow, can play again the temperature action reducing tow simultaneously.
Ensure the time of staying of tow by the height of control slow cooling, precooling, zone of silence, also reduce the temperature difference of tow radial direction while reducing strand temperature, decrease the degree of crystallinity deviation of tow top layer and internal layer, to obtain the polyester industrial yarn of low line density deviation ratio.
The manufacture method of a kind of High-strength low-elongation polyester industrial filament as above, described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
The manufacture method of a kind of High-strength low-elongation polyester industrial filament as above, described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 15 ~ 30 DEG C, and humidity is 60 ~ 80%, and wind speed is 0.2 ~ 0.8m/s.
The manufacture method of a kind of High-strength low-elongation polyester industrial filament as above, High-strength low-elongation polyester industrial filament filament number 5dtex ~ 12dtex that described method is obtained.
The general principle of the manufacture method of a kind of High-strength low-elongation polyester industrial filament of the present invention is:
After melt stream leaves spinnerets, melt stream is cooled immediately, and the tensile stress that spinnerets stretches can rise rapidly, will improve molecular preorientation degree significantly, and fiber radial direction produces birefringence gradient; Therefore, the polyester industrial yarn of superperformance be obtained, the internal stress of strand during solidification must be made low especially, thus molecular preorientation degree is reduced.Cooling velocity too fast also can causing, the solidification point of tow was moved, and the temperature difference of tow top layer and internal layer increases, and then makes the degree of crystallinity in tow cross section occur deviation.By adding a kind of annealing device of heating under spinnerets, can not quenching be there is after making melt stream spray spinnerets, but cool lentamente, namely make cooldown rate reduce, melt district extends, solidification point moves down, thus reduces the tension force of spinneret draft, and the pre-orientation degree of fiber is reduced, slow cooling effect can be played and reduce core-skin phenomenon, improve single tow cooling uniformity, be beneficial to drafting multiple and improve, the fiber of high-tenacity can be obtained.Annealing device can guarantee that the air in this region 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 in a kind of inhomogeneous cooling state cold outside and hot inside.Therefore zone of silence is increased, the transversal temperature difference of tow can be reduced further, reduce birefringence difference and the difference in crystallinity of strand surface and the strand inner core caused because of quenching, alleviate the therefore core-skin layer fibre structure formed, the quench region of tow is moved down, increase the buffer area of tow, the cooling of tow can be made more even.
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 easy heat radiation not, cooldown rate is slack-off, fiber is at the overstand of 180 ~ 200 DEG C of crystal regions, thus cause as-spun fibre degree of crystallinity excessive, form the concentration of local of tensile stress, in production, lousiness and broken end can be caused.Meanwhile, because the solidification point of fiber and then moves down, tow shake aggravation, therefore easily produces unstable air-flow, and then exacerbates the shake of tow, and make melt go out extremely unstable after spinnerets, easily produce head silk, spinning technique is under some influence.
Pre-cooler is introduced between annealing device and zone of silence, first be the position of the solidification point that ensure that as-spun fibre, the solidification point decreasing fiber moves down produced tow and shakes the irregularity brought, next effectively controls and decreases the time of staying of fiber near 180 ~ 200 DEG C, thus avoid as-spun fibre degree of crystallinity excessive result in stretch irregular, ensure stretch carry out smoothly.
Beneficial effect:
1, by the introducing of pre-cooler, reduce the cooldown rate of tow, the solidification point decreasing fiber moves down, and the generation of the unstable air-flow that the shake alleviating tow causes, controls line density deviation ratio in lower scope.
2, by the introducing of pre-cooler, decrease the time of staying of fiber near 180 ~ 200 DEG C, reduce orientation and the degree of crystallinity of as-spun fibre, be conducive to the raising of fiber after-drawing multiple.
3, by the introducing of pre-cooler, reduce the degree of crystallinity of as-spun fibre, avoid the concentration of local of tensile stress, make stretching be able to stable carrying out, be conducive to the control of line density deviation ratio.
4, the High-strength low-elongation polyester industrial filament utilizing the inventive method to prepare has that fracture strength is high, extension at break is low, line density deviation ratio is low, the rational advantage of dry-hot shrinkage, can meet the needs of application well.
Detailed description of the invention
Below in conjunction with detailed description of the invention, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
A manufacture method for High-strength low-elongation polyester industrial filament, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil---stretch---HEAT SETTING---winding shaping, wherein:
Described height glues melting polyester raw material and refers to that inherent viscosity is the sticky section of PET height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 260 DEG C, and slow cooling district exit strand temperature is 280 DEG C; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 180 DEG C, and exit, pre-cooling zone strand temperature is 260 DEG C; Described precooling is highly 30mm.
Described zone of silence cooling refers to that tow ambient temperature is 120 DEG C, and zone of silence exit strand temperature is 240 DEG C; Described zone of silence cooling is highly 200mm.
The wind-warm syndrome of described quenching is 15 DEG C; Described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 15 DEG C, and humidity is 60%, and wind speed is 0.2m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 20 DEG C, speed is 510m/min, and the temperature of the second roller is 75 DEG C, and speed is 530m/min, the temperature of the 3rd roller is 110 DEG C, 2000m/min, the 4th roll temperature is 210 DEG C, and speed is 2800m/min, the temperature of the 5th roller is 140 DEG C, and speed is 2700m/min.Described heat setting temperature is the temperature of the 5th roller, and described winding speed is 2500m/min.
The High-strength low-elongation polyester industrial filament filament number 9dtex that described method is obtained.The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio=1.5%, fracture strength=8.3cN/dtex, extension at break is 8.6%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 10.5%.
Embodiment 2
A manufacture method for High-strength low-elongation polyester industrial filament, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil---stretch---HEAT SETTING---winding shaping, wherein:
Described height glues melting polyester raw material and refers to that inherent viscosity is the sticky section of height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 300 DEG C, and slow cooling district exit strand temperature is 285 DEG C; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 DEG C, and exit, pre-cooling zone strand temperature is 265 DEG C; Described precooling is highly 80mm.Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to that air natural flows through the outer loop device of active and then cools strand.The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 50%, is highly 80mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active.
Described zone of silence cooling refers to that tow ambient temperature is 180 DEG C, and zone of silence exit strand temperature is 245 DEG C; Described zone of silence cooling is highly 300mm.Described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
The wind-warm syndrome of described quenching is 30 DEG C; Described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 30 DEG C, and humidity is 80%, and wind speed is 0.8m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 30 DEG C, speed is 600m/min, and the temperature of the second roller is 90 DEG C, and speed is 600m/min, the temperature of the 3rd roller is 130 DEG C, 2400m/min, the 4th roll temperature is 220 DEG C, and speed is 3300m/min, the temperature of the 5th roller is 160 DEG C, and speed is 3000m/min.Described heat setting temperature is the temperature of the 5th roller, and described winding speed is 2800m/min.
The High-strength low-elongation polyester industrial filament filament number 8dtex that described method is obtained.The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio=1.0%, fracture strength=9.4cN/dtex, extension at break is 11.3%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 9.7%.
Embodiment 3
A manufacture method for High-strength low-elongation polyester industrial filament, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil---stretch---HEAT SETTING---winding shaping, wherein:
Described height glues melting polyester raw material and refers to that inherent viscosity is the sticky section of height of 1.0dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 270 DEG C, and slow cooling district exit strand temperature is 282 DEG C; Slow cooling is highly 260mm.
Described precooling refers to that tow ambient temperature is 200 DEG C, and exit, pre-cooling zone strand temperature is 263 DEG C; Described precooling is highly 40mm.Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to that air natural flows through the outer loop device of active and then cools strand.The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 30%, is highly 35mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active.
Described zone of silence cooling refers to that tow ambient temperature is 130 DEG C, and zone of silence exit strand temperature is 241 DEG C; Described zone of silence cooling is highly 220mm.Described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
The wind-warm syndrome of described quenching is 18 DEG C; Described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 18 DEG C, and humidity is 62%, and wind speed is 0.3m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 DEG C, speed is 500m/min, and the temperature of the second roller is 70 DEG C, and speed is 530m/min, the temperature of the 3rd roller is 120 DEG C, 2000m/min, the 4th roll temperature is 220 DEG C, and speed is 2900m/min, the temperature of the 5th roller is 140 DEG C, and speed is 2800m/min.Described heat setting temperature is the temperature of the 5th roller, and described winding speed is 2600m/min.
The High-strength low-elongation polyester industrial filament filament number 11dtex that described method is obtained.The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio=1.3%, fracture strength=8.8cN/dtex, extension at break is 9.1%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 9.5%.
Embodiment 4
A manufacture method for High-strength low-elongation polyester industrial filament, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil---stretch---HEAT SETTING---winding shaping, wherein:
Described height glues melting polyester raw material and refers to that inherent viscosity is the sticky section of height of 1.1dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 280 DEG C, and slow cooling district exit strand temperature is 283 DEG C; Slow cooling is highly 270mm.
Described precooling refers to that tow ambient temperature is 210 DEG C, and exit, pre-cooling zone strand temperature is 262 DEG C; Described precooling is highly 50mm.Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to that air natural flows through the outer loop device of active and then cools strand.The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 35%, is highly 45mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active.
Described zone of silence cooling refers to that tow ambient temperature is 140 DEG C, and zone of silence exit strand temperature is 242 DEG C; Described zone of silence cooling is highly 230mm.Described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
The wind-warm syndrome of described quenching is 20 DEG C; Described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 20 DEG C, and humidity is 65%, and wind speed is 0.4m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 DEG C, speed is 600m/min, and the temperature of the second roller is 80 DEG C, and speed is 600m/min, the temperature of the 3rd roller is 130 DEG C, 2500m/min, the 4th roll temperature is 220 DEG C, and speed is 3200m/min, the temperature of the 5th roller is 160 DEG C, and speed is 3000m/min.Described heat setting temperature is the temperature of the 5th roller, and described winding speed is 2800m/min.
The High-strength low-elongation polyester industrial filament filament number 5dtex that described method is obtained.The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio=1.1%, fracture strength=9.2cN/dtex, extension at break is 9.5%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 9.8%.
Embodiment 5
A manufacture method for High-strength low-elongation polyester industrial filament, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil---stretch---HEAT SETTING---winding shaping, wherein:
Described height glues melting polyester raw material and refers to that inherent viscosity is the sticky section of height of 1.0dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 290 DEG C, and slow cooling district exit strand temperature is 284 DEG C; Slow cooling is highly 290mm.
Described precooling refers to that tow ambient temperature is 250 DEG C, and exit, pre-cooling zone strand temperature is 264 DEG C; Described precooling is highly 70mm.Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to that air natural flows through the outer loop device of active and then cools strand.The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 40%, is highly 70mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active.
Described zone of silence cooling refers to that tow ambient temperature is 170 DEG C, and zone of silence exit strand temperature is 244 DEG C; Described zone of silence cooling is highly 280mm.Described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
The wind-warm syndrome of described quenching is 28 DEG C; Described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 28 DEG C, and humidity is 75%, and wind speed is 0.7m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 20 DEG C, speed is 550m/min, and the temperature of the second roller is 80 DEG C, and speed is 600m/min, the temperature of the 3rd roller is 130 DEG C, 2400m/min, the 4th roll temperature is 220 DEG C, and speed is 3000m/min, the temperature of the 5th roller is 160 DEG C, and speed is 2900m/min.Described heat setting temperature is the temperature of the 5th roller, and described winding speed is 2800m/min.
The High-strength low-elongation polyester industrial filament filament number 6dtex that described method is obtained.The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio=1.2%, fracture strength=8.9cN/dtex, extension at break is 10.5%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 10.4%.
Embodiment 6
A manufacture method for High-strength low-elongation polyester industrial filament, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil---stretch---HEAT SETTING---winding shaping, wherein:
Described height glues melting polyester raw material and refers to that inherent viscosity is the sticky section of height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 275 DEG C, and slow cooling district exit strand temperature is 281 DEG C; Slow cooling is highly 275mm.
Described precooling refers to that tow ambient temperature is 220 DEG C, and exit, pre-cooling zone strand temperature is 263 DEG C; Described precooling is highly 60mm.Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to that air natural flows through the outer loop device of active and then cools strand.The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 35%, is highly 60mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active.
Described zone of silence cooling refers to that tow ambient temperature is 150 DEG C, and zone of silence exit strand temperature is 243 DEG C; Described zone of silence cooling is highly 250mm.Described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
The wind-warm syndrome of described quenching is 25 DEG C; Described quenching is ring quenching, and its technique is the temperature of ring blowing is 25 DEG C, and humidity is 72%, and wind speed is 0.6m/s.
Described five rollers that are stretched as stretch, the temperature of the first roller is 25 DEG C, speed is 520m/min, and the temperature of the second roller is 80 DEG C, and speed is 560m/min, the temperature of the 3rd roller is 140 DEG C, 2300m/min, the 4th roll temperature is 220 DEG C, and speed is 3100m/min, the temperature of the 5th roller is 140 DEG C, and speed is 2900m/min.Described heat setting temperature is the temperature of the 5th roller, and described winding speed is 2800m/min.
The High-strength low-elongation polyester industrial filament filament number 10dtex that described method is obtained.The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio=0.9%, fracture strength=8.8cN/dtex, extension at break is 10.4%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 10.2%.
Claims (6)
1. a manufacture method for High-strength low-elongation polyester industrial filament, is characterized in that: described manufacture method, and its technological process is high sticky melting polyester raw material, and------------oiling,---stretch spray silk---HEAT SETTING---winding shaping in cooling in metering;
Described height glues melting polyester raw material and refers to that inherent viscosity is the PET viscosity section of 1.0 ~ 1.2dl/g;
Described cooling comprises slow cooling, precooling, zone of silence cooling and quenching four part successively;
Described slow cooling refers to that tow ambient temperature is 260 ~ 300 DEG C, and slow cooling district exit strand temperature is 280 ~ 285 DEG C;
Described precooling is initiatively outer shroud precooling; Described active outer shroud precooling refers to and hot-air conveying is flowed through the outer loop device of active and then cools strand; The outer loop device of described active is hollow out endless belt, and it crosses wind area ratio is 20 ~ 50%, is highly 30 ~ 80mm; Described crosses the area ratio that wind area ratio refers to the windward side of the area that air flows through and the outer loop device of active; The temperature of described hot-air is 60 ~ 80 DEG C, humidity 60 ~ 80%, transporting velocity 0.2 ~ 0.8m/s;
Described precooling refers to that tow ambient temperature is 180 ~ 260 DEG C, and exit, pre-cooling zone strand temperature is 260 ~ 265 DEG C;
Described zone of silence cooling refers to that tow ambient temperature is 120 ~ 180 DEG C, and zone of silence exit strand temperature is 240 ~ 245 DEG C;
The wind-warm syndrome of described quenching is 15 ~ 30 DEG C;
The physical index of the High-strength low-elongation polyester industrial filament obtained: line density deviation ratio≤1.5%, fracture strength >=8.3cN/dtex, fracture strength CV value≤2.5%, extension at break is 10.0 ± 1.5%, extension at break CV value≤7.0%, 177 DEG C, dry-hot shrinkage under the test condition of 0.05cN/dtex is 10.0 ± 0.5%;
High-strength low-elongation polyester industrial filament filament number 5dtex ~ 12dtex that described method is obtained.
2. the manufacture method of a kind of High-strength low-elongation polyester industrial filament according to claim 1, is characterized in that, described slow cooling is highly 250 ~ 300mm.
3. the manufacture method of a kind of High-strength low-elongation polyester industrial filament according to claim 1, is characterized in that, described zone of silence cooling is highly 200 ~ 300mm.
4. the manufacture method of a kind of High-strength low-elongation polyester industrial filament according to claim 1, is characterized in that, described hollow out endless belt is the through hole of uniform diameter 5 ~ 7mm on endless belt.
5. the manufacture method of a kind of High-strength low-elongation polyester industrial filament according to claim 1, is characterized in that, described zone of silence cooling is between pre-cold-peace quenching, and zone of silence refers to the calm wind area that surrounding impales.
6. the manufacture method of a kind of High-strength low-elongation polyester industrial filament according to claim 1, is characterized in that, described quenching is lateral blowing cooling, and its technique is the temperature of lateral blowing is 15 ~ 30 DEG C, and humidity is 60 ~ 80%, and wind speed is 0.2 ~ 0.8m/s.
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