CN102787377B - Manufacturing method of safe airbag polyester industrial yarn - Google Patents
Manufacturing method of safe airbag polyester industrial yarn Download PDFInfo
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- CN102787377B CN102787377B CN201210321150.3A CN201210321150A CN102787377B CN 102787377 B CN102787377 B CN 102787377B CN 201210321150 A CN201210321150 A CN 201210321150A CN 102787377 B CN102787377 B CN 102787377B
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Abstract
The invention relates to a manufacturing method of safe airbag polyester industrial yarn. The mehtod is characterized in that the safe airbag polyester industrial yarn is manufactured by selection and control of cooling conditions; the process is as follows: highly viscous molten polyester raw materials, measurement, spinning, cooling, oiling, stretching, thermal setting and rolling for shaping. In order to reduce non-uniformity of the fiber and ensure safety of an airbag made from the polyester industrial yarn, according to the invention, a pre-cooling device is a hollow ladder ring belt consisting of upper and lower parts, on which through holes with diameter of 5-10mm are evenly distributed; and the distribution density of holes on the upper part is at least 1.5 times higher than that of holes on the lower part. The physical indexes of the obtained polyester industrial yarn are as follows: the breaking strength CV value is less than or equal to 2.5%, the breaking elongation CV value is less than or equal to 7.0%, the denier of mono-filament is 2-6dtex, and the dry-heat shrinkage is 3.5+/-0.5% under the test conditions of 177 DEG C and 0.05 cN/dtex.
Description
Technical field
The present invention relates to a kind of production method of polyester industrial yarn, especially relate to a kind of manufacture method of air bag polyester industrial yarn, belong to polyester industrial yarn and manufacture field.
Background technology
Terylene is a most important kind in chemical fibre, and its function admirable, is widely used, and not only in clothes materials, accounts for critical role, and aspect industry articles for use, also demonstrates powerful vitality.Polyester industrial yarn is high owing to having intensity, and modulus is large, extend little, heat-resisting, shock-resistant, the advantage such as fatigue performance is good, and be widely used in tire cord, safety belt, air bag, conveyer belt, high-pressure resin reinforcing material.
Safe automobile air bag is widely used at present on automobile; in order to make automobile can effectively play protection personnel's safety by bus when there is sharp impacts; air bag must have good physical and mechanical properties; the frictional behaviour that desired strength is high, quality is light, good, good springiness, suitable hot property, high chemical stability, ageing resistance, folding volume are little, fabric sofetening, at air bag, fill rapidly and are difficult for scratch personnel by bus while rising.Since air bag invention, Tynex occupies most market shares always.But along with the development of gas cell fabric finishing technique, polyester industrial yarn is used to the processing of gas cell fabric gradually due to advantages such as cost are low, intensity is high, chemical resistance is good.The polyester industrial yarn of using as air bag, multiselect fine denier filament, can reduce air bag quality, makes it to be easy to folding installation.Desired strength is high simultaneously, elongation is large.
In the melt spinning process of polyester industrial yarn, the melt thread of extruding from spinnerets, through the cooling solidified forming of cooling air, form the preliminary aggregated structure of fiber, the quality being shaped can directly affect the spinnability of fiber and the quality of finished product, and it all has considerable influence to the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc.Common PET melt used, it is that melt thread is gone out after spinnerets by quenching, cooldown rate is high, the tension force of spinneret draft is large, and the pre-orientation degree of fiber is large, thereby core-skin phenomenon appears in fiber, make single tow cooling uniformity not good, the coefficient of variation of fiber (CV value) is bigger than normal, is unfavorable for the raising of drafting multiple, is difficult to obtain high-intensity fiber.Therefore in polyester industrial yarn is produced, the selection of cooling condition and control are the significant effects factors in polyester industrial yarn forming process.
In order to have obtained superperformance polyester industrial yarn, conventionally under spinnerets, add a kind of annealing device of heating, make tow cooling lentamente, install zone of silence device additional simultaneously, increase the buffer area of tow, more equably cooling tow.But along with adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of as-spun fibre and then moves down, tow shake aggravation, cause easily producing unsettled air-flow, aggravated the shake of tow, melt has been gone out after spinnerets unstable, spinning technique is under some influence, near the time of staying of as-spun fibre crystal region is longer simultaneously, thereby cause as-spun fibre degree of crystallinity excessive, in production, can cause lousiness and broken end, decrease in yield.And good cooling control makes fiber have the suitable degree of orientation and degree of crystallinity, make final goods have the advantages that fracture strength is high, elastic modelling quantity is high, line density deviation ratio is low.
In prior art, the manufacture method of the polyester industrial fiber for processing safe air bag of automobile described in patent CN101634052B, although can substitute nylon 66 fiber, reduces production costs, and its stretching and heat setting process are complicated.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manufacture method of air bag polyester industrial yarn is provided.The selection of cooling condition and control are most important influence factors in polyester industrial yarn forming process, in melt spinning process, the melt thread of extruding from spinnerets, through the cooling solidified forming of cooling air, form the preliminary aggregated structure of fiber, the quality being shaped directly affects the spinnability of fiber and the quality of finished product, and the degree of orientation 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 air bag polyester industrial yarn.
The manufacture method of a kind of air bag polyester industrial yarn of the present invention, its technological process is high sticky melting polyester raw material, and---------cooling---oiling,---spray silk stretches---HEAT SETTING---winding shaping in metering; The terylene chips adopting is the sticky section of height obtaining by solid-phase tack producing, and its inherent viscosity is 1.0～1.2dl/g, because its molecular weight distribution is narrower, number-average molecular weight is higher, and 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 air bag 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; It under annealer, is pre-cooler, pre-cooler is a kind of passive outer shroud precooling, described precooling is the tow for the as-spun fibre in molten condition, passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural, passive outer loop device is hollow out endless belt, and precooling is played very important effect to falling low-fiber irregularity; 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, obtain high-quality fiber, finally obtain the polyester industrial yarn that safety coefficient is high.
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 ladder; Described passive outer shroud ladder precooling refers to flow through passive outer shroud stepwise device and then carry out cooling to strand of air natural; Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40～60%, be highly 20～40mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 20～30%, is highly 20～40mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt;
Described precooling refers to that tow ambient temperature is 160～260 ℃, 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 air bag polyester industrial yarn: line density deviation ratio≤1.5%, fracture strength >=7.0cN/dtex, fracture strength CV value≤2.5%, extension at break is 22.0 ± 2.0%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.5 ± 0.5%.
What often industrial yarn was emphasized is 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 the principal element that affects line density deviation ratio of cooling condition.
As preferred technical scheme:
Slow cooling described in the manufacture method of a kind of air bag polyester industrial yarn as above is highly 250～300mm.
The manufacture method of a kind of air bag 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 air bag polyester industrial yarn.
The manufacture method of a kind of air bag polyester industrial yarn as above, the upper part of described hollow out ladder endless belt and lower part be the through hole of uniform diameter 5～10mm all, the cloth hole density of the upper part of described hollow out ladder endless belt is at least 1.5 times of cloth hole density of the lower part of described hollow out ladder endless belt, and described cloth hole density refers to the cloth hole number in unit are.Pre-cooling zone adopts hollow out endless belt, and to select certain altitude and cross wind area be mainly in order to reduce air stream through the disturbance to tow, to play again the effect that reduces strand temperature simultaneously.
The manufacture method of a kind of air bag 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 air bag 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 air bag polyester industrial yarn as above, air bag polyester industrial yarn filament number 2～6dtex that described method makes.
The basic principle of the manufacture method of a kind of air bag 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, thereby improve the safety coefficient of finished product.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 near the time of staying of fiber 180～200 ℃, thereby avoided that as-spun fibre degree of crystallinity is excessive have been caused stretching irregular, what guarantee to stretch carries out and the security of finished product smoothly.
Beneficial effect:
1,, 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.
2, the introducing by pre-cooler reduces the orientation of as-spun fibre and the object of crystallization to reach, and finally obtains high-quality fiber.
3, the introducing of pre-cooler produces beneficial effect to the stretching of fiber, has improved the modulus of prepared fiber and the safety coefficient of product.
4, utilize the air bag polyester industrial yarn of the inventive method manufacture to have that fracture strength is high, line density deviation ratio is low, the rational advantage of dry-hot shrinkage, can meet well the needs of application.
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 air bag 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 260 ℃, and slow cooling district exit strand temperature is 280 ℃; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 160 ℃, and exit, pre-cooling zone strand temperature is 250 ℃; Described precooling is highly 40mm.
Described zone of silence is cooling refers to that tow ambient temperature is 100 ℃, and zone of silence exit 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 22 ℃, speed is 1851m/min, the temperature of second roller is 69 ℃, and speed is 2251m/min, and the temperature of the 3rd roller is 191 ℃, speed is 3645m/min, the 4th roll temperature is 147 ℃, and speed is 3038m/min, and the speed of the 5th roller is 2803m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2803m/min.
The air bag polyester industrial yarn filament number 5dtex that described method makes.The physical index of resulting air bag polyester industrial yarn: line density deviation ratio 0.09%, fracture strength 7.0cN/dtex, fracture strength CV value 0.6%, extension at break is 20.0%, extension at break CV value 1.2%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.0%.
Embodiment 2
A manufacture method for air bag 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 1.05dl/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 slow cooling district exit strand temperature is 285 ℃; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 ℃, and exit, pre-cooling zone strand temperature is 260 ℃; Described precooling is highly 80mm.
Described zone of silence is cooling refers to that tow ambient temperature is 160 ℃, and zone of silence exit 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 18 ℃, speed is 1832m/min, the temperature of second roller is 67 ℃, and speed is 2274m/min, and the temperature of the 3rd roller is 216 ℃, speed is 3928m/min, the 4th roll temperature is 177 ℃, and speed is 3406m/min, and the speed of the 5th roller is 2939m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2939m/min.
The air bag polyester industrial yarn filament number 10dtex that described method makes.The physical index of resulting air bag polyester industrial yarn: line density deviation ratio 1.5%, fracture strength 7.85cN/dtex, fracture strength CV value 2.5%, extension at break is 24.0%, extension at break CV value 7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 4.0%.
Embodiment 3
A manufacture method for air bag polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.02dl/g.
Described 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 slow cooling district exit strand temperature is 282 ℃; Slow cooling is highly 275mm.
Described precooling refers to that tow ambient temperature is 210 ℃, and exit, pre-cooling zone strand temperature is 255 ℃; Described precooling is highly 60mm.
Described zone of silence is cooling refers to that tow ambient temperature is 130 ℃, and zone of silence exit strand temperature is 225 ℃; The cooling height of described zone of silence is 250mm.
The wind-warm syndrome of described quenching is 23 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 23 ℃, 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 1912m/min, the temperature of second roller is 69 ℃, and speed is 2257m/min, and the temperature of the 3rd roller is 200 ℃, speed is 3379m/min, the 4th roll temperature is 154 ℃, and speed is 3236m/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 air bag polyester industrial yarn filament number 8dtex that described method makes.The physical index of resulting air bag polyester industrial yarn: line density deviation ratio 1.1%, fracture strength 7.5cN/dtex, fracture strength CV value 1.7%, extension at break is 23.0%, extension at break CV value 5.2%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.7%.
Embodiment 4
A preparation method for air bag polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.12dl/g.
Described 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 slow cooling district exit strand temperature is 280 ℃; Slow cooling is highly 250mm.
Described precooling refers to that tow ambient temperature is 160 ℃, and exit, pre-cooling zone strand temperature is 250 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40%, be highly 20mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 20%, is highly 20mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt; The upper part of described hollow out ladder endless belt and lower part be the through hole of uniform diameter 5mm all, the cloth hole density of the upper part of described hollow out ladder endless belt is at least 1.5 times of cloth hole density of the lower part of described hollow out ladder endless belt, and described cloth hole density refers to the cloth hole number in unit are.
Described zone of silence is cooling refers to that tow ambient temperature is 100 ℃, and zone of silence exit strand temperature is 220 ℃;
The cooling height of described zone of silence is 200mm.Described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
The wind-warm syndrome of described quenching is 15 ℃; 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 21 ℃, speed is 3256m/min, the temperature of second roller is 79 ℃, and speed is 4852m/min, and the temperature of the 3rd roller is 206 ℃, speed is 6091m/min, the 4th roll temperature is 149 ℃, and speed is 5806m/min, and the speed of the 5th roller is 5762m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5762m/min.
The air bag polyester industrial yarn filament number 2dtex that described method makes, the physical index of resulting air bag polyester industrial yarn: line density deviation ratio 0.08%, fracture strength 7.0cN/dtex, fracture strength CV value 0.14%, extension at break is 20.0%, extension at break CV value 1.8%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.0%.
Embodiment 5
A preparation method for air bag 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 1.03dl/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 260～300 ℃, and slow cooling district exit strand temperature is 285 ℃; Slow cooling is highly 300mm.
Described precooling refers to that tow ambient temperature is 260 ℃, and exit, pre-cooling zone strand temperature is 260 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 60%, be highly 40mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 30%, is highly 40mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt; The upper part of described hollow out ladder endless belt and lower part be the through hole of uniform diameter 10mm all, the cloth hole density of the upper part of described hollow out ladder endless belt is at least 1.5 times of cloth hole density of the lower part of described hollow out ladder endless belt, and described cloth hole density refers to the cloth hole number in unit are.
Described zone of silence is cooling refers to that tow ambient temperature is 100～160 ℃, and zone of silence exit 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 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 20.5 ℃, speed is 3353m/min, the temperature of second roller is 78 ℃, and speed is 4834m/min, and the temperature of the 3rd roller is 201 ℃, speed is 6240m/min, the 4th roll temperature is 151 ℃, and speed is 6089m/min, and the speed of the 5th roller is 6004m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6004m/min.
The air bag polyester industrial yarn filament number 6dtex that described method makes, the physical index of resulting air bag polyester industrial yarn: line density deviation ratio 1.5%, fracture strength 8.0cN/dtex, fracture strength CV value 2.5%, extension at break is 24.0%, extension at break CV value 7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 4.0%.
Embodiment 6
A preparation method for air bag 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 1.06dl/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 slow cooling district exit strand temperature is 283 ℃; Slow cooling is highly 276mm.
Described precooling refers to that tow ambient temperature is 220 ℃, and exit, pre-cooling zone strand temperature is 256 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 50%, be highly 31mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 26%, is highly 31mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt; The upper part of described hollow out ladder endless belt and lower part be the through hole of uniform diameter 8mm all, the cloth hole density of the upper part of described hollow out ladder endless belt is at least 1.5 times of cloth hole density of the lower part of described hollow out ladder endless belt, and described cloth hole density refers to the cloth hole number in unit are.
Described zone of silence is cooling refers to that tow ambient temperature is 131 ℃, and zone of silence exit strand temperature is 226 ℃; The cooling height of described zone of silence is 276mm.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 23 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 23 ℃, and humidity is 71%, and wind speed is 0.6m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 21.9 ℃, speed is 3351m/min, the temperature of second roller is 85 ℃, and speed is 5240m/min, and the temperature of the 3rd roller is 214 ℃, speed is 6109m/min, the 4th roll temperature is 153 ℃, and speed is 6002m/min, and the speed of the 5th roller is 5819m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5819m/min.
The air bag polyester industrial yarn filament number 4dtex that described method makes, the physical index of resulting air bag polyester industrial yarn: line density deviation ratio 1.0%, fracture strength 7.6cN/dtex, fracture strength CV value 1.3%, extension at break is 23.0%, extension at break CV value 3.1%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.71%.
Embodiment 7
A preparation method for air bag polyester industrial yarn, its technological process is high sticky melting polyester raw material---metering---spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticky melting polyester raw material of described height refers to that inherent viscosity is the sticky section of height of 1.07dl/g.
Described 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 slow cooling district exit strand temperature is 284 ℃; Slow cooling is highly 277mm.
Described precooling refers to that tow ambient temperature is 223 ℃, and exit, pre-cooling zone strand temperature is 258 ℃.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling refers to flow through passive outer loop device and then carry out cooling to strand of air natural.Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 52%, be highly 34mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 24%, is highly 33mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt; The upper part of described hollow out ladder endless belt and lower part be the through hole of uniform diameter 8.1mm all, the cloth hole density of the upper part of described hollow out ladder endless belt is at least 1.5 times of cloth hole density of the lower part of described hollow out ladder endless belt, and described cloth hole density refers to the cloth hole number in unit are.
Described zone of silence is cooling refers to that tow ambient temperature is 134 ℃, and zone of silence exit strand temperature is 228 ℃; The cooling height of described zone of silence is 274mm.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 26 ℃; Described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 26 ℃, and humidity is 73%, and wind speed is 0.65m/s.
Described four rollers that are stretched as stretch, the temperature of the first roller is 25 ℃, speed is 3315m/min, the temperature of second roller is 81 ℃, and speed is 5204m/min, and the temperature of the 3rd roller is 210 ℃, speed is 6801m/min, the 4th roll temperature is 154 ℃, and speed is 6151m/min, and the speed of the 5th roller is 6005m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6005m/min.
The air bag polyester industrial yarn filament number 4.5dtex that described method makes, the physical index of resulting air bag polyester industrial yarn: line density deviation ratio 0.9%, fracture strength 7.8cN/dtex, fracture strength CV value 1.2%, extension at break is 23.5%, extension at break CV value 2.9%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.64%.
Claims (6)
1. a manufacture method for air bag polyester industrial yarn, is characterized in that: described manufacture method, and its technological process is high sticky melting polyester raw material, and---------cooling---oiling,---spray silk stretches---HEAT SETTING---winding shaping in metering;
The sticky melting polyester raw material of described height refers to that inherent viscosity is the PET section of 1.0～1.2dl/g;
Described 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 ladder; Described passive outer shroud ladder precooling refers to flow through passive outer shroud stepwise device and then carry out cooling to strand of air natural; Described passive outer shroud stepwise device is hollow out ladder endless belt, and described hollow out ladder endless belt is comprised of upper and lower two parts; The wind Area Ratio excessively of the upper part of described hollow out ladder endless belt is 40～60%, be highly 20～40mm, the described ratio of crossing area that wind Area Ratio refers to air stream part openwork part on described hollow out ladder endless belt and the area of the windward side of the upper part of described hollow out ladder endless belt; The wind Area Ratio excessively of the lower part of described hollow out ladder endless belt is 20～30%, is highly 20～40mm; The described ratio of crossing area that wind Area Ratio refers to air stream part openwork part under described hollow out ladder endless belt and the area of the windward side of the lower part of described hollow out ladder endless belt;
Described precooling refers to that tow ambient temperature is 160～260 ℃, 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 air bag polyester industrial yarn: line density deviation ratio≤1.5%, fracture strength >=7.0cN/dtex, fracture strength CV value≤2.5%, extension at break is 22.0 ± 2.0%, extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 3.5 ± 0.5%;
Air bag polyester industrial yarn filament number 2～6dtex that described method makes.
2. the manufacture method of a kind of air bag polyester industrial yarn according to claim 1, is characterized in that, described slow cooling is highly 250～300mm.
3. the manufacture method of a kind of air bag polyester industrial yarn according to claim 1, is characterized in that, the cooling height of described zone of silence is 200～300mm.
4. the manufacture method of a kind of air bag polyester industrial yarn according to claim 1, it is characterized in that, the upper part of described hollow out ladder endless belt and lower part be the through hole of uniform diameter 5～10mm all, the cloth hole density of the upper part of described hollow out ladder endless belt is at least 1.5 times of cloth hole density of the lower part of described hollow out ladder endless belt, and described cloth hole density refers to the cloth hole number in unit are.
5. the manufacture method of a kind of air bag polyester industrial yarn according to claim 1, is characterized in that, described zone of silence is cooling between pre-cold-peace quenching, and zone of silence refers to the calm region that surrounding impales.
6. the manufacture method of a kind of air bag polyester industrial yarn according to claim 1, is characterized in that, described quenching is that lateral blowing is cooling, and the temperature that its technique is lateral blowing is 15～30 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
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