CN1321230C - Process for manufacturing high modulus low retraction type trueran industrial filament and trueran industrial filament thereof - Google Patents
Process for manufacturing high modulus low retraction type trueran industrial filament and trueran industrial filament thereof Download PDFInfo
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- CN1321230C CN1321230C CNB021211418A CN02121141A CN1321230C CN 1321230 C CN1321230 C CN 1321230C CN B021211418 A CNB021211418 A CN B021211418A CN 02121141 A CN02121141 A CN 02121141A CN 1321230 C CN1321230 C CN 1321230C
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Abstract
The present invention discloses a two-step method processing technology of high-modulus and low-shrinkage industrial dacron threads, and industrial dacron threads thereof. Polyethylene terephthalate (PET) melt spinning is used. PET is extruded out from a thread spraying hole, and is slowly cooled, solidified and oiled to be curled, a spinning speed is from 500 to 4000 m/min, and then non-drafted threads are obtained. The non-drafted threads enter a feeding roller by a tension adjusting device, and orderly pass through a first drafting roller, a high temperature region, a second drafting roller, a shaping roller and the tension adjusting device to be curled and shaped. The strength of the obtained high-modulus and low-shrinkage industrial dacron threads is higher than 6.3 cN/tax. When the industrial dacron threads are extended by 5%, the corresponding stress is not lower than 3.6 cN/tax, the shrinkage rate is not higher than 3.5% at the temperature of 177 DEG C, and the physical and mechanical performance is excellent. The processing technology has the advantages of simple device and easy-control technology, and is suitable for the non-drafted threads obtained at different spinning speeds.
Description
Invention field
The present invention relates to the preparation technology and the polyester industrial yarn thereof of the low shrinkage type polyester industrial yarn (following brief note is HMLS) of high-modulus.The present invention is to provide spinning, the stretching two-step method prepares technology, after promptly tow is extruded from spinneret orifice, through slow cooling, the back of solidifying, oil reels, and then undrawn yarn stretched and HEAT SETTING is handled.The low shrinkage type polyester industrial yarn of said high-modulus is meant that its performance satisfies fracture strength greater than 6.3cN/dtex, and the stress (following brief note is LASE-5) that extends 5% o'clock correspondence is not less than 3.6cN/dtex; Shrinkage factor in the time of 177 ℃ is not more than 3.5%.
Background technology
Since early 1960s is developed the polyester industrial yarn cord fabric thread,, be widely used in fields such as tire, conveyer belt, conveyer belt, safety belt and coated fabric, filter cloth and geotextiles as rubber framework material.
In various types of polyester industrial yarns, the using value of HMLS is the highest, is applicable to senior passenger tire, and high strength and modulus guarantees that it has the low-loss merit, reduce tire heating in use, low-shrinkage can be convenient to improve the processing and forming of tire and avoid the side indenture.
At present the preparation technology of HMLS can roughly be divided into two kinds of spinning, stretching one-step method and two-step methods, its objective is the aggregated structure that obtains strand highly crystalline and orientation.Since as the crystallizing power of the polyethylene terephthalate (PET) of fiber-forming polymer a little less than, make the preparation of the HMLS quite difficulty that becomes.
The advantage of one-step technology is the efficient height, thereby is adopted widely.But because the stretching HEAT SETTING is to carry out under higher speed, so the heated time of tow is shorter, and crystalline growth is insufficient, can not take into account low requirement of shrinking.
US 5132067,5234764 and 5630976 adopts one-step method to prepare the patent of HMLS, and the performance of its final products can not be taken into account high strength, modulus and low-shrinkage simultaneously.When reaching high strength and modulus, its shrinkage factor is higher than 5.5%, and when shrinkage factor is 4.3% (minimum of a value in the patent), its LASE-5 is less than 3.7cN/dtex, and intensity is less than 6.0cN/dtex.
Te Kaiping 6-313211 (1994) adopts one-step method to prepare HMLS, spinning speed is higher than 4500m/min, the intensity of finished silk is the highest when the winding speed of 7500m/min, be 6.83cN/dtex, this moment, the shrinkage factor in the time of 150 ℃ was 3.5%, and intensity is 6.57cN/dtex when the winding speed of 4500m/min, and this moment, the shrinkage factor in the time of 150 ℃ was 2.3%, and performance is unsatisfactory.
In order to reduce shrinkage factor, can adopt the way that improves heat roller temperature, but too high heat roller temperature had both caused the bonding of tow easily, this hot-rolling is shortened service life, cause in the system replacement cycle of hot-rolling asynchronous.The way that US5066439 has adopted increase insulated cabinet and noncontact hot plate to prolong shaping time for this reason, obtained the low shrinkage type industry of high strength silk, do not provide the value of LASE-5 in the literary composition, but from up to 20% extension at break, it does not meet the requirement of high-modulus.
In addition, one-step technology is to the requirement height of winding apparatus, and the difficult steady control that realizes technology.
The advantage of two-step process be to equipment require lowly, technology is controlled easily.And can guarantee necessary heat-setting time, good HMLS is favourable for processability.
But according to present technology, required process time is long, and efficient is very low.US 5102603 utilizes two-step process to prepare the polyester industrial yarn of high strength and modulus low-shrinkage, and intensity reaches 7.78cN/dtex, and shrinkage factor is 6.1%.Need two thermals treatment zone in its twice stretch with setting process, and need the heat time heating time of 0.3s at least, if improve process velocity, just must increase thermal treatment zone length like this, as under the winding speed of 600m/min, thermal treatment zone length needs 18m at least.Make the performance of product not reach the low contraction of high-modulus requirement again if improve process velocity, adopting the two-step process utilizations to spin speed as US 4491657 is that the spun filament of 2000～6000m/min prepares HMLS, although its finished silk performance has high strength and modulus, but its shrinkage factor in the time of 150 ℃ is higher, greater than 4.3%.
Existing two-step process mainly is to improve crystallization and orientation by prolonging crystallization time, temperature just can not be set too high like this, otherwise can bonding or fusing take place because of long-time heating causes tow, this moment, crystalline growth speed was lower, with the competition of disorientation in do not have advantage, be difficult to obtain the crystallization and the orientation of height.
Summary of the invention
The present invention aims to provide the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus, described preparation technology adopts spinning, stretching two-step method to prepare technology, undrawn yarn is improved crystallization by high temperature raising crystallization, HEAT SETTING under higher tension force, realize the crystallization and the orientation of height, prepared polyester industrial yarn has excellent physical and mechanical properties and low-shrinkage, described preparation technology process time is short, efficient is high, device therefor is simple, technology be easy to control, be applicable to difference spin speed undrawn yarn.
Another purpose of the present invention is to provide a kind of high-modulus to hang down the shrinkage type polyester industrial yarn, and it is low that described polyester industrial yarn has excellent physical and mechanical properties, modulus height, shrinkage factor.
To achieve these goals, the technical solution used in the present invention is: the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus comprises: adopt melt spinning method, PET extrudes from spinneret orifice, reeling in process slow cooling, the back of solidifying, oil, obtains the undrawn yarn of different orientation degree.Undrawn yarn stretches and HEAT SETTING through one stretching, high-temperature region, two roads through behind the tension-adjusting gear, passes through package moulding after the tension adjustment again, obtains having concurrently the finished silk of high-modulus, high strength and low-shrinkage performance.
Describe the present invention in detail below in conjunction with accompanying drawing, referring to accompanying drawing 1, the preparation method of the low shrinkage type polyester industrial yarn of high-modulus of the present invention is: fusion PET enters after spinneret orifice is extruded when spinning temperature is 280～310 ℃ and tight 280～450 ℃ of adjacent hot jackets of spinnerets, enter the blowing zone after going out hot jacket, tow is cooling curing in the blowing zone, tow after the curing oil after behind the overtension dancer rools under 500～4000m/min spinning speed coiling and molding, obtain undrawn yarn.
Undrawn yarn is through obtaining certain pretension behind the tension-adjusting gear, through feeding roller to first draw roll, between the feeding roller and first draw roll, realize stretching together, then tow behind the high-temperature area of 400～550 ℃ Fast Heating to second draw roll, realize that between first draw roll and second draw roll two roads stretch, package moulding behind setting roller and tension-adjusting gear again, the finished product polyester industrial yarn that obtains.
Wherein stretching together and making the draw ratio of tow is 90～99% of maximal draw ratio, below is designated as λ
1/ λ 1
Max, maximal draw ratio herein is meant the temperature-resistant of the speed that keeps the feeding roller and the temperature and first draw roll, only changes under the condition of the first draw roll speed tow stable operation and the maximal draw ratio that do not rupture and can reach.
Two roads stretch and make the draw ratio of tow is the 90-99% of maximal draw ratio, below is designated as λ
2/ λ 2
MaxMaximal draw ratio herein is meant the temperature-resistant of the setting of the speed that keeps first draw roll and temperature, high-temperature area and second draw roll, only change under the condition of the second draw roll speed tow stable operation and the maximal draw ratio that do not rupture and to reach.
Specifically, undrawn yarn is through after obtaining the pretension of strain 0.1～2% corresponding stress behind the tension-adjusting gear, through speed is 50-2000m/min, temperature be 70-100 ℃ feeding roller to temperature less than 120 ℃ first draw roll, tow is heated rapidly to second draw roll through high-temperature area and realizes that two roads stretch then, the temperature of second draw roll is higher than 200 ℃ less than the temperature that tow bonding takes place and fuses.The temperature that feeds roller, draw roll and setting roll among the present invention refers to the temperature of roller surfaces.
PET had in the present invention both referred to the Polyethyleneglycol Terephthalate polymer of repetitive from terephthalic acid (TPA) or dimethyl terephthalate (DMT) and ethylene glycol, also refer to contain in the repetitive a spot of polybasic carboxylic acid from other, the polymer of polyalcohol and polyhydroxy-alcohol, these other carboxylic acids or the molar percentage of alcohol in polyester are no more than 5%, also comprise some additives, as playing 1 of plasticization, 4-dihydroxy ethoxybenzene, the molar percentage of these additives is no more than 5%, these are fully open in the prior art, and method of the present invention is applicable to disclosed other PET and copolymer thereof in the prior art.
The molecular weight of fibre-forming polymer is a deciding factor that influences fibre strength, the maximum fracture strength that fiber can reach increases with the increase of mean molecule quantity, therefore, requiring PET to extrude its intrinsic viscosity of back [η] from spinnerets among the present invention is 0.84～1.00dL/g.
The increase of mean molecule quantity and the reduction of temperature all can cause melt viscosity to increase, setting up annealing device is to extrude back too fast its melt viscosity that causes of cooling for fear of PET sharply to increase, make drawing process become difficult, thereby cause the mechanical property of finished silk to reduce.Annealing device is that the length of hot jacket and temperature are with the specifications vary of spinnerets and tow fineness at spinnerets bottom and its tight adjacent hot jacket, but the length of hot jacket is 10～50cm, and temperature is 280～450 ℃.
In the present invention, be used for the combination that blowing device can be side-blown, interior ring blows, outer shroud blows one or more modes that tow solidifies, preferably adopt ring to blow mode, make tow more even, wind-warm syndrome is 20～50 ℃, air quantity is relevant with winding speed with fiber number, the blowing mode of tow, regulates wind-warm syndrome and air quantity, makes tow in the preceding curing that oils.
In the present invention, the spinning speed of undrawn yarn is 500～4000m/min, and filament number is 1～60dtex, is preferably 5～50dtex.Undrawn yarn can be a sub-thread, also can adopt the Split Down mode to obtain bigger fineness and stretch.
In the present invention, undrawn yarn is through obtaining certain pretension behind the tension-adjusting gear, its purpose is to guarantee the stable of drawing process, the added pretension of undrawn yarn is the range of stress of strain 0.1～2% correspondence, and said herein strain is meant the respective value of the stress-strain diagram that obtains according to GB/T 16604-1996 method.
In the present invention, high-temperature area mainly is for the tow Fast Heating, its thermal source can adopt various forms, for example elevated temperature heat piece or hot fluid, as air or steam etc., said here elevated temperature heat piece can be the heat dish of using always, tow passes through from hot panel surface, or pass through from the centres of two heat dishes, also can be in the middle of the hot piece etc. of fluting or perforate, referring to the schematic diagram of accompanying drawing 2a-d elevated temperature heat piece of the present invention.Accompanying drawing 2a is that tow 1 coils the schematic diagram that 2 surfaces are passed through from heat, and accompanying drawing 2a-1 is the side view of hot piece 2; Accompanying drawing 2b is the schematic diagram that tow 1 passes through from the centre of two heat dishes 3, and accompanying drawing 2b-1 is the side view of hot piece 3; The accompanying drawing 2c schematic diagram that to be tow 1 pass through from the hot piece 4 of side fluting, accompanying drawing 2c-1 is the side view of hot piece 4; Accompanying drawing 2d is the hot piece 5 middle schematic diagrames that pass through of tow 1 from middle perforate or fluting, and accompanying drawing 2d-1 and accompanying drawing 4d-1 are respectively the side view of the hot piece 5 of fluting or opening; From the angle of the thermal efficiency and energy savings, the hot piece of middle perforate shown in the accompanying drawing 2d or fluting is better.
When adopting hot piece to heat, the length in heat zone is not more than 35cm, and the temperature of hot piece is 400～550 ℃.Can behind this elevated temperature heat piece, increase heat block again, its objective is that the tow to having passed through drawing by high temperature carries out HEAT SETTING, be equivalent to increase heat-setting time.The hot piece of this increase is called the additional heat piece, just between the high-temperature area of Fast Heating and two roads stretch, comprises that also one is carried out the additional heat piece of HEAT SETTING to the tow that has passed through drawing by high temperature, and its temperature is lower than 400 ℃, and length is less than 300cm.
Described high-temperature area also can be hot fluids such as air or steam, and when adopting overfire air or Steam Heating, the temperature of vapours is 400～500 ℃.Behind the superheated steam zone, can increase additional heat piece same as described above again.
In the present invention, heat setting process can also can carry out on two setting rolls at a setting roll.If adopt a setting roll, the temperature of setting roll is higher than 200 ℃ and is lower than the temperature that bonding and fusing take place tow simultaneously.Dancer rools speed, the draw ratio that makes tow is 0.90～1.00.If increase by second setting roll, the roller temperature is higher than 200 ℃ and is lower than the temperature that bonding and fusing take place tow simultaneously.Dancer rools speed, the draw ratio that makes tow is 0.95～1.00.
In the present invention, heat setting process can also carry out in the insulated cabinet that comprises a pair of hot-rolling and noncontact hot plate, and is described as US 5066439.Wherein the temperature of two hot-rollings, speed equate, dancer rools speed, the draw ratio that makes tow is 0.90～1.00, the temperature of hot-rolling is higher than 200 ℃ and is lower than the temperature that bonding and fusing take place tow simultaneously, hot plate be between the hot-rolling with hot-rolling between the tow direction of motion parallel, hot plate is 0.1～5cm apart from the distance of tow, hot plate can be up and down between the tow, also can be outside tow up and down, the temperature of hot plate is higher than 200 ℃, is lower than the temperature that bonding and fusing take place tow simultaneously.
Adopt the polyester industrial yarn of the inventive method preparation, intensity is greater than 6.3cN/dtex, and LASE-5 is not less than 3.6cN/dtex, and the percent thermal shrinkage when extension at break is at least 8.5%, 177 ℃ is not more than 3.5%.
In the present invention, by stretching fully together, it is higher and aggregated structure that degree of crystallinity is relatively low makes strand become easy to the conversion of crystallization to obtain the degree of orientation.Quick rising fiber temperature under higher tension force improves crystalline growth speed subsequently, in case degree of crystallinity significantly improves, disorientation just is suppressed, and the realization of this part technology mainly realizes by increasing less high-temperature area.Because the zone is less, that temperature can be set is higher, and tow was heated up faster, avoids again causing tow that bonding or fusing take place in this high-temperature area long time of stop.At last further improve crystallization by follow-up heat setting process again, can obtain HMLS, be used for goods such as tire.
It is the undrawn yarn of 500～4000m/min that the present invention can utilize spinning speed, prepares the low shrinkage type industry of high-modulus silk by twice stretching and heat setting process, and equipment is simple, and technology is easy to control, and has higher efficient.Be also pointed out that advantage of the present invention also is to utilize the low degree of orientation undrawn yarn of early stage low speed spinning equipment preparation at present on the verge of being replaced to produce HMLS, thereby reduce cost of equipment.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 a-d is an elevated temperature heat piece schematic diagram of the present invention.
Be specific embodiments of the invention below, described embodiment is used to describe the present invention, rather than restriction the present invention.
Table 1 has provided the performance of the technological parameter and the finished silk of embodiment and comparative example.
The specific embodiment
In the following embodiments, the fracture strength of finished silk according to GB/T 16604-1996 at the powerful aircraft measurements of INSTRON-1122, rate of extension 500mm/min, sample clamping length 500mm.The fracture strength of undrawn yarn is measured and is removed rate of extension 200mm/min, and outside the sample clamping length 200mm, all the other are identical with finished silk.
Shrinkage factor is measured according to GB/T 16604-1996, adds tension force 0.5cN/Tex, at 177 ℃ of heat treatment 10min, measures the length variations of fiber, is calculated as follows out shrinkage factor:
Extend 5% stress and be designated as LASE-5, be meant and extend the stress of 5% o'clock correspondence when utilizing the powerful machine of INSTRON-1122 to measure fracture strength.
Intrinsic viscosity is to adopt capillary viscometer to measure, and system is phenol-tetrachloroethanes system, and mass ratio is 1: 1, measures 20.0 ± 0.1 ℃ of temperature.
Embodiment 1
Polyethylene terephthalate (PET tackify section, petrochemical industry limited company in Shanghai produces) is extruded from spinneret orifice at about 295 ℃, and the intrinsic viscosity after extruding [η] is 0.93dL/g; Spinnerets bottom and its closely length of adjacent hot jacket are 40cm, the hot jacket that enters the temperature closely adjacent with spinnerets and be 300 ℃ carries out slow cooling, tow is cooling curing in the blowing zone, tow after the curing oils after reel under the spinning speed of 3200m/min behind the overtension dancer rools, obtains undrawn yarn.
The above-mentioned undrawn yarn HEAT SETTING that next stretches is handled.Process route adopts following order:
Undrawn yarn---dance roller---feeding roller---first draw roll---heat district---second draw roll---setting roller---dance roller---package.The performance of concrete technological parameter and finished silk is as shown in table 1.
The speed of adjustment of tonicity dancer rools makes the about 0.2cN/dtex of the pretension of undrawn yarn, and the speed of feeding roller is 150m/min, and roll surface temperature is 800 ℃.Regulate the speed of first draw roll, between the feeding roller and first draw roll, realize stretching together, making draw ratio is 96% of maximal draw ratio, temperature is 80 ℃, is 470 ℃ elevated temperature heat piece heating through the silk after stretching together by temperature, the speed of regulating second draw roll, tow realizes that between first draw roll and second draw roll two roads stretch, the temperature that makes two road draw ratios reach 96%, the second draw roll of maximal draw ratio is 220 ℃, and total drawing ratio is 2.15.Regulate the speed of setting roller, the draw ratio that makes this stage is 0.98, and the temperature of setting roller is 220 ℃, carries out package through arriving coiler device behind the dance roller again.The performance of finished silk is as shown in table 1.
Wherein the tow 1 of elevated temperature heat piece shown in Fig. 2 a coils 2 surfaces from heat and passes through.
Embodiment 2
Other is with embodiment 1, different is the PET tackify section that PET adopts Zaozhuang chemical fibre group company of Taida to produce, intrinsic viscosity after extruding [η] is 0.87dL/g, and feeding roller speed is 800m/min, and temperature is 90 ℃, the temperature of first draw roll is 90 ℃, the temperature of elevated temperature heat piece is 540 ℃, and the temperature of first setting roll is 235 ℃, increases by second setting roll, temperature is 235 ℃, and the draw ratio of tow between first, second setting roll is 1.00.Other technological parameters are referring to table 1.
Wherein the elevated temperature heat piece is shown in Fig. 2 b, and tow 1 passes through from the centre of two heat dishes 3.
Embodiment 3
Other is with embodiment 1, and different is the PET tackify section that PET Wuxi Tai Ji group produces, and spins speed and is 3000m/min, and the speed of feeding roller is 450m/min, and the temperature of second draw roll is 210 ℃, λ
2/ λ x is that the temperature of 90%, the first setting roll is 210 ℃, and draw ratio is 0.99, increases by second setting roll, and temperature is 210 ℃, and draw ratio is 0.90, and other technological parameters are referring to table 1.
Wherein the elevated temperature heat piece is shown in Fig. 2 c, and tow 1 passes through from the hot piece 4 of side fluting.
Embodiment 4
Other is with embodiment 1, different is to spin speed to be 3600m/min, and the speed of feeding roller is 1800m/min, and the temperature of feeding roller is 100 ℃, the temperature of first draw roll is 120 ℃, adopt vapours to add hot-stretch, temperature is 450 ℃, between the high-temperature area and the stretching of two roads of Fast Heating, also comprise a heating region again that the tow that has passed through drawing by high temperature is carried out HEAT SETTING, promptly increase the additional heat piece, temperature is 350 ℃, length 250cm.Other technological parameters are referring to table 1.
Wherein the elevated temperature heat piece is shown in Fig. 2 d, and tow 1 passes through in the middle of the hot piece 5 of middle perforate.
Embodiment 5
Other is with embodiment 1, and different is that spinning speed is 3000m/min, and feeding roller speed is 1000m/min, and the temperature of first draw roll is 90 ℃, and the elevated temperature heat deblocking temperature is 490 ℃, increases the additional heat piece, and temperature is 300 ℃, and the temperature of second draw roll is 200 ℃, λ
2/ λ
2maxBe 99%, the draw ratio during HEAT SETTING is 0.90, and other technological parameters are referring to table 1.
Wherein the elevated temperature heat piece is shown in Fig. 2 d, and tow 1 passes through in the middle of the hot piece 5 of centre fluting.
Embodiment 6
Other is with embodiment 1, and that different is λ
1/ λ
1maxBe 90%, the heating of elevated temperature heat piece is changed to the vapours heating, temperature is 420 ℃, λ
2/ λ
2maxBe 99%, other technological parameters are referring to table 1.
Embodiment 7
Other is with embodiment 1, and the spinning speed of different is undrawn yarn is 1400m/min, and the speed of feeding roller is 50m/min, and temperature is 90 ℃, and the temperature of first draw roll is 90 ℃, λ
1/ λ
1maxBe 93%, increase the additional heat piece, temperature is 3900 ℃, and the temperature of second draw roll is 2000 ℃, λ
2/ λ
2maxThe temperature that is 95%, the first setting roll is 200 ℃, and draw ratio is that the temperature of 0.97, the second setting roll is 220 ℃, and draw ratio is 0.99, and other technological parameters are referring to table 1.
Embodiment 8
Other is with embodiment 1, and the spinning speed of different is undrawn yarn is 500m/min, and the speed of feeding roller is 50m/min, λ
1/ λ
1maxBe 99%, the temperature of elevated temperature heat piece is 400 ℃, increases the additional heat piece, and temperature is 350 ℃, and other technological parameters are referring to table 1.
Embodiment 9
Other is with embodiment 1, and different is to spin speed to be 500m/min, and the temperature of feeding roller is 70 ℃, and the temperature of first draw roll is 30 ℃, and increasing by the second setting roll temperature is 220 ℃, and draw ratio is 0.95, and other technological parameters are referring to table 1.
Comparative example 1. other with embodiment 1, that different is λ
1/ λ
1maxBe 85%.
Comparative example 2. other with embodiment 1, the temperature of different is elevated temperature heat piece is 330 ℃.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Comparative example 1 | Comparative example 2 | |
| Spinning speed (m/min) | 3200 | 3200 | 3000 | 3600 | 3000 | 3200 | 1400 | 500 | 500 | 3200 | 3200 |
| The feeding roll temperature (℃) | 80 | 90 | 80 | 100 | 80 | 80 | 90 | 80 | 70 | 80 | 80 |
| Feeding roller speed (m/min) | 150 | 800 | 450 | 1800 | 1000 | 150 | 50 | 50 | 150 | 150 | 150 |
| First draw roll temperature (℃) | 80 | 90 | 80 | 120 | 90 | 80 | 90 | 80 | 30 | 80 | 80 |
| λ 1/λ 1max×100(％) | 96 | 96 | 96 | 96 | 96 | 90 | 93 | 99 | 96 | 85 | 96 |
| The elevated temperature heat deblocking temperature (℃) | 470 | 540 | 470 | - | 490 | - | 470 | 400 | 470 | 470 | 330 |
| The additional heat deblocking temperature (℃) | - | - | - | 350 | 300 | - | 390 | 350 | - | - | - |
| Vapor (steam) temperature (℃) | - | - | - | 450 | - | 420 | - | - | - | - | - |
| Second draw roll temperature (℃) | 220 | 220 | 230 | 220 | 200 | 220 | 230 | 220 | 220 | 220 | 220 |
| λ 2/λ 2max×100(％) | 96 | 96 | 90 | 96 | 99 | 99 | 95 | 96 | 96 | 96 | 96 |
| The first setting roll temperature (℃) | 220 | 235 | 210 | 220 | 220 | 220 | 200 | 220 | 220 | 220 | 220 |
| Draw ratio | 0.98 | 0.98 | 0.99 | 0.98 | 0.90 | 0.98 | 0.97 | 0.98 | 0.98 | 0.98 | 0.98 |
| The second setting roll temperature (℃) | - | 235 | 210 | - | - | - | 220 | - | 220 | - | - |
| Draw ratio | - | 1.00 | 0.90 | - | - | - | 0.99 | - | 0.95 | - | - |
| Intensity (cN/dtex) | 7.25 | 7.10 | 6.90 | 7.25 | 6.50 | 6.75 | 7.05 | 7.00 | 6.95 | 6.20 | 6.80 |
| LASE-5(cN/dtex) | 4.40 | 4.10 | 3.80 | 4.20 | 3.80 | 4.00 | 4.05 | 4.35 | 4.20 | 3.50 | 3.75 |
| Extension at break (%) | 8.8 | 9.2 | 10.0 | 8.5 | 10.5 | 9.0 | 8.3 | 8.8 | 8.5 | 8.0 | 8.0 |
| Shrinkage factor (%) | 2.9 | 2.7 | 2.0 | 3.0 | 2.0 | 2.5 | 2.9 | 3.2 | 3.5 | 4.5 | 6.5 |
Claims (14)
1. the preparation technology of the low shrinkage type polyester industrial yarn of a high-modulus, adopt spinning and two step process that stretch, in the spinning technique PET is extruded from spinneret orifice, through slow cooling, solidify, the back coiling oils, the undrawn yarn that obtains being orientated, it is characterized in that in the drawing process, undrawn yarn is through after obtaining pretension behind the tension-adjusting gear, through speed is 50～2000m/min, temperature be 70～100 ℃ feeding roller to temperature less than 120 ℃ first draw roll, between the feeding roller and first draw roll, realize stretching together, stretching together and making the draw ratio of tow is 90～99% of maximal draw ratio, tow is to second draw roll through temperature behind 400～550 ℃ the high-temperature area of Fast Heating then, the temperature of bonding and fusing takes place in the temperature of second draw roll less than tow, be higher than 200 ℃, two roads stretch and make the draw ratio of tow is 90～99% of maximal draw ratio, passes through HEAT SETTING then, pass through package moulding after the tension adjustment again.
2. the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 1, wherein
A). fusion PET enters after spinneret orifice is extruded when spinning temperature is 280～310 ℃ and tight 280 ~ 450 ℃ of adjacent hot jackets of spinnerets, enter the blowing zone after going out hot jacket, tow is cooling curing in the blowing zone, tow after the curing oil after behind the overtension dancer rools under 500～4000m/min spinning speed coiling and molding, obtain undrawn yarn;
B). undrawn yarn obtains pretension through behind the tension-adjusting gear, through feeding roller to first draw roll, between the feeding roller and first draw roll, realize stretching together, then tow behind the high-temperature area of Fast Heating to second draw roll, realize that between first draw roll and second draw roll two roads stretch package moulding behind HEAT SETTING and tension-adjusting gear again.
3. the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 2, wherein between the high-temperature area and the stretching of two roads of Fast Heating, also comprise a heating region again that the tow that has passed through drawing by high temperature is carried out HEAT SETTING, the temperature of heating region is lower than 400 ℃ again, and length is less than 300cm.
4. according to the preparation technology of the low shrinkage type polyester industrial yarn of claim 1 or 2 or 3 described a kind of high-moduluss, wherein said PET is the Polyethyleneglycol Terephthalate polymer of repetitive from terephthalic acid (TPA) or dimethyl terephthalate (DMT) and ethylene glycol, or contain the copolymer of molar percentage in the repetitive, and contain molar percentage less than 5% additive PET copolymer less than 5% polybasic carboxylic acid, polyalcohol and polyhydroxy-alcohol.
5. according to the preparation technology of claim 1 or the low shrinkage type polyester industrial yarn of 2 or 3 described a kind of high-moduluss, wherein the intrinsic viscosity [η] of PET after spinnerets is extruded is 0.84～1.00dL/g; Spinnerets bottom and its closely length of adjacent hot jacket are 10～50cm, the combination that the blowing device that tow solidifies can be side-blown, interior ring blows, outer shroud blows one or more modes, and wind-warm syndrome is 20～50 ℃.
6, the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 5 is characterized in that described blowing mode is to make the ring that tow evenly solidifies blow mode.
7. the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 1 and 2, wherein the thermal source of the high-temperature area of Fast Heating is elevated temperature heat piece or hot fluid, said elevated temperature heat piece is that tow coils the hot piece of the middle heat dishes that pass through or middle fluting or perforate from hot panel surface or two heat, and said hot fluid is overfire air or steam.
8. according to the preparation technology of the low shrinkage type polyester industrial yarn of claim 1 or 2 or 3 described a kind of high-moduluss, wherein HEAT SETTING comprises a setting roll, the temperature of setting roll is bonded between the temperature of fusing between 200 ℃ and tow, and the draw ratio of tow is 0.90～1.00.
9. the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 8, wherein HEAT SETTING also comprises one second setting roll, second setting roll temperature between 200 ℃ of temperature that bonding and fusing takes place to tow, the draw ratio of tow is 0.95～1.00.
10. the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 1, wherein undrawn yarn is through obtaining the pretension of the corresponding stress of strain 0.1-2% after the tension adjustment.
11, the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 2, wherein the undrawn yarn filament number is 1-60dtex.
12, the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 11, wherein the undrawn yarn filament number is 5-50dtex.
13, the preparation technology of the low shrinkage type polyester industrial yarn of a kind of high-modulus according to claim 1, wherein the high-temperature area length of Fast Heating is not more than 35cm.
14. hang down the low shrinkage type polyester industrial yarn of high-modulus of preparation technology's preparation of shrinkage type polyester industrial yarn according to claim 1 or 2 or 3 described a kind of high-moduluss, intensity is at least 6.3cN/dtex, LASE-5 is at least 3.6cN/dtex, percent thermal shrinkage when extension at break is at least 8.5%, 177 ℃ is less than 3.5%.
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| CNB021211418A CN1321230C (en) | 2002-06-10 | 2002-06-10 | Process for manufacturing high modulus low retraction type trueran industrial filament and trueran industrial filament thereof |
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| CNB021211418A CN1321230C (en) | 2002-06-10 | 2002-06-10 | Process for manufacturing high modulus low retraction type trueran industrial filament and trueran industrial filament thereof |
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| CN1321230C true CN1321230C (en) | 2007-06-13 |
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Cited By (1)
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| CN101265620B (en) * | 2008-04-30 | 2010-11-24 | 浙江尤夫高新纤维股份有限公司 | Blending fire retardant -type terylene industrial filament and its manufacturing technique |
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