CN103849954A - Production method of polyester industrial filament for melt directly-spun safe belt - Google Patents
Production method of polyester industrial filament for melt directly-spun safe belt Download PDFInfo
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- CN103849954A CN103849954A CN201410083243.6A CN201410083243A CN103849954A CN 103849954 A CN103849954 A CN 103849954A CN 201410083243 A CN201410083243 A CN 201410083243A CN 103849954 A CN103849954 A CN 103849954A
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Abstract
The invention discloses a production method of a polyester industrial filament for a melt directly-spun safe belt. The production method is characterized by comprising the following steps of (1) melt tackifying: carrying out melt liquid-phase tackifying polymerization on a low-viscosity melt obtained through polycondensation; (2) melt direct spinning: delivering a high-viscosity polyester melt to all spinning positions, entering a spinning box body, metering and filtering the melt, then, extruding the melt by means of a spinneret plate, heating the melt by using a slow cooling heater, cooling the melt by means of cross air blowing, then, entering a spinning channel, bundling and oiling; (3) heat setting by drafting: carrying out two-stage drafting and loosened heat setting; (4) winding for forming: winding for forming after carrying out network treatment on the fiber obtained in the step (3) so as to obtain the polyester industrial filament.
Description
Technical field
The present invention relates to fiber product manufacturing technology field, be specifically related to the production method of a kind of fused mass directly spinning safety belt polyester industrial filament yarn.
Background technology
Car belt industrial filament, traditional car belt is produced and is adopted section spinning process flow process with industrial filament: undertaken after esterification, polycondensation reaction by PTA and EG, cooling and dicing is made IV0.65-0.68dL/g section, make again the sticky section of height of IV0.92-1.10Dl/g by solid phase polycondensation, by the spinning of screw rod melt extruded, batch and make through drawing and heat-setting.Tradition solid phase polycondensation process route is manufactured car belt and is had with industrial filament that technological process is long, equipment investment is large, the high deficiency of energy consumption.
Summary of the invention
Technical problem to be solved by this invention is: a kind of method of melt direct spinning High-speed machining polyester industrial filament is provided, reaches the object of industrial filament for the production fused mass directly spinning safety belt of low energy consumption, high finished product rate.
For achieving the above object, the technical scheme that the present invention takes is as follows:
The production method of polyester industrial filament yarn for fused mass directly spinning safety belt, comprises the steps:
(1) melt tackify: low polycondensation gained sticky melt is carried out to the polymerization of melt liquid-phase tackifying;
(2) melt direct spinning: high viscosity polyester melt Conveying to each spinning station, enters spinning manifold, melt is extruded by spinnerets through metering, after filtering, heated by slow cooling heater, then after lateral blowing is cooling, enter spinning shaft, boundling oils;
(3) drawing and heat-setting: carry out two-stage stretching, and relaxation heat setting;
(4) coiling and molding: after network processes, coiling and molding, makes product through the fiber of step (3).
In step (1), described liquid-phase tackifying is that the low sticky melt that viscosity that polycondensation is obtained is 0.65-0.71dl/g carries out tackify in the film formation reaction of vertical liquid-phase tackifying still.Reaction temperature is 275 ~ 285 DEG C, and the reaction time is 90 ~ 110 minutes, and the melt viscosity that tackify obtains is 1.00 ~ 1.15dl/g, and b value is less than 3.
In step (2), spinning adopts 8/spinning, and after the pump of measuring pump, pressure is 15 ~ 25MPa, and filtering accuracy is 15 ~ 20 μ m, and the diameter of spinnerets is 192mm, and spinning temperature is 290 ~ 300 DEG C.
In step (2), slow cooling adds thermal recovery slow cooling heater, and slow cooling heater height is 230mm, and slow heating-up temperature is 270-350 DEG C.
In step (2), in cross air blowing device, lateral blowing temperature is 20 ~ 25 DEG C, and humidity is 75 ~ 80%, and wind speed is: 0.45-0.6m/s.
In described cross air blowing device, be provided with dividing plate, make every ingot tow cooling condition relatively independent.
In step (2), spinning shaft is oval, and its tube wall outlet is perforated plate construction.
In step (2), oil and adopt oil tanker to oil, oil tanker is arranged at spinning shaft below, and oil applying rate is 0.4% ± 0.2.
In step (3), two-stage stretches and comprises that one-level stretches and two-stage stretches, and one-level draw ratio is 4.0-4.2, and secondary drawing is than being 1.40-1.42, and the temperature of drawing process is 90 ~ 235 DEG C, and total drawing ratio is 5.9-6.05.
In step (3), the temperature of relaxation heat setting is 140-150 DEG C, and total relaxation compares 0.2%-0.25%.
Operation principle and the beneficial effect of technical solution of the present invention are as follows:
The present invention has adopted vertical viscosity-increasing reactor, melt enters and distributes from top, there is gravity nature film forming to flow down, advance without power, the little molecular product that polycondensation produces is removed by vacuum suction, melt first in first out, has ensured that high sticky melt has consistent reaction condition and the time of staying in reactor.The polymeric reaction temperature in liquid-phase tackifying stage is controlled at 275 ~ 285 DEG C, and the reaction time is controlled at 90 ~ 110min.Adopt above-mentioned process conditions, can suppress the generation of side reaction in high temperature tackify course of reaction, ensure that melt form and aspect are good, meanwhile, also can effectively improve melt viscosity, Reaction time shorten, maintain large capacity long-term operation, the high sticky melt of output high-quality polyester, more than the melt viscosity after tackify can reach 1.0-1.1dl/g, melt b value is less than 3, can meet the demand of terylene industrial yarn spinning.
The present invention compared with prior art has the following advantages:
1, taking high-viscosity polyester melt as raw material, large flow directly spins safety belt polyester industry yarn, the spinning fiber number of single head can reach for 1500 dawn, the fracture strength of fiber is greater than 8.0cN/dtex, with existing safety belt with compared with polyester industrial filament yarn production process, under the prerequisite being protected at melt and fiber quality, to shorten the reaction time, effectively shorten technological process, raised the efficiency, reduced and consume.
2, cross air blowing device adopts sandwich construction, comprises rectification once, filter course.Thickness is 50mm, has both ensured that wind speed profile was even, has dividing plate between every ingot simultaneously, has effectively reduced the impact between ingot and ingot.
3, spinning shaft is related to oval tube wall and fenced by many hollow plates form, and the spinning shaft of loose structure makes inside and outside air balance, and is easy to exchange the heat of strand.
4, owing to being melt direct spinning, be not subject to the flow restriction of spinning screw spinning, thereby in technical solution of the present invention, spinning machine adopts 8/.The safety belt polyester industrial filament that this method is produced, constant product quality, production efficiency is high, has improved the output of unit interval, has reduced and has produced power consumption and production cost.
Adopt the prepared product of technical solution of the present invention to can be used as silk for automotive safety.
Below in conjunction with detailed description of the invention, technical solution of the present invention is further elaborated.
specific embodiments
Embodiment 1
One, technological parameter is as follows:
Equipment: LSP liquid phase polymerization equipment; Spinning equipment; Stretching and winding equipment.
Product specification: 1100tex/96f.
Raw material: viscosity 1.02dl/g after glossy polyester melt tackify; End carboxyl-COOH≤26mol/t; Diethylene glycol (DEG)≤1.2%.
Liquid phase polymerization temperature: 278-285 DEG C.
Spinning temperature: 296 DEG C.
Slow cooling heating-up temperature: 300 DEG C.
Measuring pump is for amount: 320g/min.
Lateral blowing cooling parameter:
Wind speed: 0.50m/s; Humidity: 80%; Wind-warm syndrome: 21 DEG C.
Stretching condition (two-stage stretching)
one-level draw ratio: 4.19,
Total draw ratio: 5.98,
| Draw roll | Speed m/min | Temperature DEG C |
| GR1 | ?470 | ? |
| GR2 | ?495 | 87 |
| GR3 | 1970 | 130 |
| GR4 | 2815? | 237 |
| GR5 | ?2735? | 150 |
Winding speed: 2700m/min.
Spinning oil: Japan produces, this HLM-100 of pine, compound concentration 18%.
Network device pressure: pre-network 0.15MPa,
Master network 0.35MPa,
Two, concrete technology step:
1) processing high-viscosity polyester melt: first base polyester melt (low sticky melt) is transported to liquid phase polymerizer tackify once again by pipeline; reaction temperature is 278 DEG C; reaction time is 90 minutes; under the protection of high vacuum, melt improves viscosity by film apparatus, and the ethylene glycol that reaction produces and other side reaction things are by vacuum sucking-off.Melt viscosity is brought up to 1.05dl/g from 0.655dl/g;
2) direct fabrics: the polyester fondant after liquid-phase tackifying polymerization is delivered to spinning manifold by melt house steward, after entering filament spinning component, extrudes from spinnerets measuring pump again, the diameter of spinnerets is 190mm, heated by slow cooling heater, slow cooling heating-up temperature is 340 DEG C, highly 230mm, again by cross air blowing device cooling forming, blowing temperature is at 21 DEG C, humidity is 80%, and wind speed: 0.50m/s is provided with rectification and filtering material in cross air blowing device, rectifying material just has monoblock cellular board, and filtering material adopts metal mesh filter.Then enter spinning shaft, spinning shaft is designed to ellipse, and every synnema has the how empty spinning shaft of a square tube type, makes inside and outside air balance, and is easy to exchange the heat of strand;
3) stretching and winding: at 8/, single head fiber number is 1120dtex, 2700 ms/min of spinning speeds; Oil on silk surface, adopt two-stage high-speed stretch, under 90 ~ 100 DEG C of conditions of heating-up temperature, stretch, total draw ratio is 5.97; Be, under the condition of 235-237 DEG C, to carry out high temperature, relaxation heat setting in temperature; And in the scope of 2700 ms/min of process speeds coiling and molding, make finished product.
The safety belt industrial filament that the present embodiment is produced, line density is 1120 ± 20dtex, fracture strength is greater than 8.0cN/dtex, the coefficient of variation is less than 4.5%, elongation at break 13 ± 2%, dry-hot shrinkage 7.5% ± 0.8(177 DEG C × 1minwith0.05g/d).
Embodiment 2
One, technological parameter is as follows:
Equipment: LSP liquid phase polymerization equipment; Spinning equipment; Stretching and winding equipment.
Product specification: 1670dtex/96f.
Raw material: viscosity 1.02dl/g after glossy polyester melt tackify; End carboxyl-COOH≤26mol/t; Diethylene glycol (DEG)≤1.2%.
Liquid phase polymerization temperature: 278-285 DEG C.
Spinning temperature: 293 DEG C.
Slow cooling heating-up temperature: 300 DEG C.
Pump is for amount: 446g/min.
Lateral blowing cooling parameter:
Wind speed: 0.55m/s; Humidity: 80%; Wind-warm syndrome: 21 DEG C.
Stretching condition (two-stage stretching):
one-level draw ratio: 4.17,
Total draw ratio: 6.15,
| Draw roll | Speed m/min | Temperature DEG C |
| GR1 | ?450 | ? |
| GR2 | 470? | 88 |
| GR3 | 1880 | 95 |
| GR4 | ?2700? | 135 |
| GR5 | 2660? | 235 |
Winding speed: 2600m/min.
Spinning oil: Japan produces, this HLM-100 of pine, compound concentration 18%.
Network device pressure: pre-network 0.15MPa,
Master network 0.35MPa.
Two, concrete technology step:
1) processing high-viscosity polyester melt: first base polyester melt is transported to liquid phase polymerizer tackify once again by pipeline; reaction temperature is 278 DEG C; reaction time is 90 minutes; under the protection of high vacuum, melt improves viscosity by film apparatus, and the ethylene glycol that reaction produces and other side reaction things are by vacuum sucking-off.Melt viscosity is brought up to 1.10dl/g from 0.655dl/g;
2) direct fabrics: the polyester fondant after liquid-phase tackifying polymerization is delivered to spinning manifold by melt house steward, after entering filament spinning component, extrudes from spinnerets measuring pump again, the diameter of spinnerets is 190mm, heated by slow cooling heater, slow cooling heating-up temperature is 340 DEG C, highly 230mm, again by cross air blowing device cooling forming, blowing temperature is at 21 DEG C, humidity is 80%, and wind speed: 0.50m/s is provided with rectification and filtering material in cross air blowing device, rectifying material just has monoblock cellular board, and filtering material adopts metal mesh filter.Then enter spinning shaft, spinning shaft is designed to ellipse, and every synnema has the how empty spinning shaft of a square tube type, makes inside and outside air balance, and is easy to exchange the heat of strand;
3) stretching and winding: at 8/, 12/line, single head fiber number is 1670dtex, spinning speed 2590-2610 m/min; Oil on silk surface, carry out the two-stage high-speed stretch in above-mentioned technological parameter, under 90 ~ 100 DEG C of conditions of heating-up temperature, stretch, total draw ratio is 5.16; Be, under the condition of 250 ~ 256 DEG C, to carry out high temperature, relaxation heat setting in temperature; And in the scope of 2600 ms/min of process speeds coiling and molding, make finished product.
The safety belt industrial filament that the present embodiment is produced, line density is 1670 ± 30dtex, fracture strength is greater than 8.0cN/dtex, the coefficient of variation is less than 3%, elongation at break 13 ± 2%, dry-hot shrinkage 6.5% ± 1(177 DEG C × 1minwith0.05g/d).
Claims (10)
1. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt, is characterized in that, comprises the steps:
(1) melt tackify: low polycondensation gained sticky melt is carried out to the polymerization of melt liquid-phase tackifying;
(2) melt direct spinning: high viscosity polyester melt Conveying to each spinning station, enters spinning manifold, melt is extruded by spinnerets through metering, after filtering, heated by slow cooling heater, then after lateral blowing is cooling, enter spinning shaft, boundling oils;
(3) drawing and heat-setting: carry out two-stage stretching, and relaxation heat setting;
(4) coiling and molding: after network processes, coiling and molding, makes product through the fiber of step (3).
2. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, it is characterized in that: in step (1), described liquid-phase tackifying is that the low sticky melt that viscosity that polycondensation is obtained is 0.65-0.71dl/g carries out tackify in the film formation reaction of vertical liquid-phase tackifying still; Reaction temperature is 275 ~ 285 DEG C, and the reaction time is 90 ~ 110 minutes, and the melt viscosity that tackify obtains is 1.00 ~ 1.15dl/g, and b value is less than 3.
3. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, it is characterized in that: in step (2), spinning adopts 8/spinning, after the pump of measuring pump, pressure is 15 ~ 25MPa, filtering accuracy is 15 ~ 20 μ m, the diameter of spinnerets is 192mm, and spinning temperature is 290 ~ 300 DEG C.
4. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, is characterized in that: in step (2), slow cooling adds thermal recovery slow cooling heater, and slow cooling heater height is 230mm, and slow heating-up temperature is 270-350 DEG C.
5. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, is characterized in that: in step (2), in cross air blowing device, lateral blowing temperature is 20 ~ 25 DEG C, and humidity is 75 ~ 80%, and wind speed is: 0.45-0.6m/s.
6. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1 or 5, is characterized in that: in described cross air blowing device, be provided with dividing plate, make every ingot tow cooling condition relatively independent.
7. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, is characterized in that: in step (2), spinning shaft is oval, and its tube wall outlet is perforated plate construction.
8. the production method with polyester industrial filament yarn according to the fused mass directly spinning safety belt described in claim 1 or 7, is characterized in that: in step (2), oil and adopt oil tanker to oil, oil tanker is arranged at spinning shaft below, and oil applying rate is 0.4% ± 0.2.
9. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, it is characterized in that: in step (3), two-stage stretches and comprises that one-level stretches and two-stage stretches, one-level draw ratio is 4.0-4.2, secondary drawing is than being 1.40-1.42, the temperature of drawing process is 90 ~ 235 DEG C, and total drawing ratio is 5.9-6.05.
10. the production method of polyester industrial filament yarn for fused mass directly spinning safety belt according to claim 1, is characterized in that: in step (3), the temperature of relaxation heat setting is 140-150 DEG C, and total relaxation compares 0.2%-0.25%.
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Cited By (5)
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| CN104451918A (en) * | 2014-12-11 | 2015-03-25 | 浙江尤夫高新纤维股份有限公司 | Production method of melt direct spinning flat polyester industrial filaments |
| CN105369377A (en) * | 2015-12-04 | 2016-03-02 | 浙江古纤道新材料股份有限公司 | High-strength type HMLS terylene industrial yarn processing equipment |
| CN108642584A (en) * | 2018-05-23 | 2018-10-12 | 北京中丽制机工程技术有限公司 | Combination machine is led in the fine female silk spinning of one kind point |
| CN108642583A (en) * | 2018-05-23 | 2018-10-12 | 北京中丽制机工程技术有限公司 | A kind of spinning drawing combination machine and spinning-drawing machine monomer pumping device |
| CN108642585A (en) * | 2018-05-23 | 2018-10-12 | 北京中丽制机工程技术有限公司 | Combination machine is led in a kind of spinning of FDY filament |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108642583A (en) * | 2018-05-23 | 2018-10-12 | 北京中丽制机工程技术有限公司 | A kind of spinning drawing combination machine and spinning-drawing machine monomer pumping device |
| CN108642585A (en) * | 2018-05-23 | 2018-10-12 | 北京中丽制机工程技术有限公司 | Combination machine is led in a kind of spinning of FDY filament |
| CN108642584B (en) * | 2018-05-23 | 2021-03-16 | 北京中丽制机工程技术有限公司 | Spinning and drawing combination machine for split-fiber female yarns |
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