CN1733984A - High-strength low-extension polyester staple fiber preparation method - Google Patents
High-strength low-extension polyester staple fiber preparation method Download PDFInfo
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- CN1733984A CN1733984A CN 200410053605 CN200410053605A CN1733984A CN 1733984 A CN1733984 A CN 1733984A CN 200410053605 CN200410053605 CN 200410053605 CN 200410053605 A CN200410053605 A CN 200410053605A CN 1733984 A CN1733984 A CN 1733984A
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- 239000000835 fiber Substances 0.000 title claims description 36
- 229920000728 polyester Polymers 0.000 title claims description 33
- 238000002360 preparation method Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000009998 heat setting Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000009987 spinning Methods 0.000 claims description 13
- 239000002918 waste heat Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 6
- 229920004933 Terylene® Polymers 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 3
- 238000003856 thermoforming Methods 0.000 abstract 7
- 239000000047 product Substances 0.000 abstract 4
- 239000004744 fabric Substances 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- 230000035922 thirst Effects 0.000 abstract 1
- 229920000742 Cotton Polymers 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229920004934 Dacron® Polymers 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- 238000002074 melt spinning Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
This invention relates to a terylene product technology, especially to a preparing method for short fabric with high strength and low elongation. This method uses the tow without drawing-off (short for original tow) for raw material, the working procedure for the production as follows: the first drawing-off, the second drawing-off, 18 roll tense thermoforming, the third drawing-off, curling, loose thermoforming, cutting off. Namely carrying out the first drawing-off through the water bath which between the thirst drafting machine and the second drafting machine; carrying out the second drawing-off through the steam heater which between the second drafting machine and the 18 roll tensely thermoforming machine; and then carrying out the thermoforming through the 18 roll tense thermoforming machine; carrying out the surplus drawing-off through the third drafting machine; curling through the curling machine; then drying through the loose thermoforming machine and cutting off after the thermoforming treatment. The original tow in this technology has a better drawing off, basically it hasn't the none-drawing off product, double long product and exceed long product, and the final product has the high strength, low elongation, and low thermal contraction and so on. The rupture strength >= 6.0CN/dtex, the rupture elongate rate 11-25%, the dry thermal contraction rate<8%.
Description
Technical field
The invention belongs to the terylene production technology, be in particular a kind of preparation method of high-strength flatness polyester staple fiber.
Background technology
Polyester staple fiber is with good, the corrosion-resistant good performance and be widely used in various fields such as high-grade clothing, leather and fur products, medical surgery, military supplies such as go mouldy of intensity height, durability.The polyester staple fiber for preparing high-strength flatness generally all adopts nervous HEAT SETTING and the supporting aftertreatment technology of relaxation heat setting, and requirement possesses performances such as high strength, low elongation and low xeothermic contraction.
Current domestic and international polyester staple fiber trial-manufacture technology mainly contains following two kinds:
(1) continues to use the production route of general polyester staple fiber, strong flatness polyester staple fiber in the production.Production method: adopt conventional spinning and aftertreatment technology, strong dacron short silk among spinning fracture strength 5.0～6.0CN/dtex, its main technique is: with inherent viscosity is that 0.63～0.65 polyester carries out melt spinning, between 1100～1250 meters/minute of the spinning technique speed; The raw tow that makes adopts two road drawing-offs, the temperature by regulating water bath, steam chest and together, two road stretching ratio proportionings produce in strong flatness dacron short silk.Its secondary drawing-off is carried out between second drawing machine and the 3rd drawing machine.
The spinning speed of this method is low, and production capacity does not increase; Its nervous HEAT SETTING adopts 5 rollers, only plays styling, no relaxation heat setting machine; The fracture strength index of the polyester staple fiber that makes is lower than the present invention.
(2) continue to use the production route of general polyester staple fiber, produce general cotton type polyester staple fiber.Production method: adopt conventional spinning and aftertreatment technology, the general cotton type polyester staple fiber of spinning fracture strength 4.0～5.0CN/dtex, its main technique is: with inherent viscosity is that 0.63～0.65 polyester carries out melt spinning, between 950～1250 meters/minute of the spinning technique speed; The raw tow that makes adopts the secondary draft process.Temperature by regulating water bath, Steam Heating case and together, the proportioning of two road stretching ratios, produce general cotton type polyester staple fiber.It does not establish heat setting machine, but the relaxation heat setting machine is arranged.Adopt low-pressure steam, carry out the low temperature drawing-off, two road drawing-offs are carried out between second drawing machine and the 3rd drawing machine.
More than fracture strength and other qualities of the polyester staple fiber produced of two kinds of traditional handicrafts all can not satisfy the requirement of market to high-strength flatness fiber, especially the clothing industry sewing thread is to the requirement of fracture strength.
Purpose of the present invention is exactly the preparation method that a kind of high-strength flatness polyester staple fiber is provided for the different demands that satisfy market.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of preparation method of high-strength flatness polyester staple fiber, it is raw material with the raw tow, successively through the nervous HEAT SETTING of one drawing-off, two road drawing-offs, 18 rollers, three road drawing-offs, curl, relaxation heat setting, cut-out operation process produce.
Purpose of the present invention can also further realize by following technical measures:
The preparation method of aforesaid a kind of high-strength flatness polyester staple fiber, described raw tow is that inherent viscosity is 0.63～0.65 normal polyester melt, at spinning technique be: 1100～1500 meters/minute of spinning speeds, tow cooling air temperature is 18～28 ℃, cooling wind pressure is 900～4500Pa, and wind speed is a raw tow of making 0.89～3.33dtex, 3701f～4620f under 1.2～2.5 meters/minute the condition.Fracture strength CV value≤12% of raw tow, extension at break CV value≤11%; This raw tow is in one drafting process, and successively through first drawing machine, temperature is 65～75 ℃ a water bath, and second drawing machine carries out one drawing-off, draw ratio 2.4～3.2; Enter temperature controlling range then at 90～120 ℃ Steam Heating case, pass through 18 roller tension-setting machines of setting roller surface temperature control scope 〉=210 ℃ again, carry out two road drawing-offs, eliminate residual stress, make strand obtain whole orientations of its molecular structure, two road draw ratios 1.5～1.05; Finish the residue drawing-off through the 3rd drawing machine, draw ratio 1.0～0.98; The curling temperature of process is that the silk after 80～110 ℃ crimper curls is cooled to temperature below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.
The invention has the advantages that:
(1) adopt the nervous heat setting process of 18 rollers, U type heating circuit guarantees and satisfies technology to the uniform and stable requirement of roll surface temperature from the change of device structure itself.
(2) adopt the cascade flash system, both can regulate nervous setting roller surface temperature arbitrarily, can make temperature difference control stabilization between each district 1 ℃ of Δ according to technological requirement in certain temperature range; Can make full use of the waste heat of the condensed water that comes out in nervous HEAT SETTING the 4th, three districts again, produce indirect steam after the flash distillation and utilize to second, one district setting roll again and heat, flash distillation step by step can be saved～30% steam consumption quantity.
Performances such as the high-strength flatness polyester staple fiber that (3) makes has the fracture strength height, elongation at break is low, dry-hot shrinkage is low, crimpness is stable, overlength and over-length fibre are few, its production Denier range is big, and is widely applicable, and production run is stable.
Purpose of the present invention, advantage and characteristics will illustrate by the non-limitative illustration of following preferential enforcement and explain that these embodiment only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
The specific embodiment
As shown in Figure 1, the present invention makes the raw tow of 0.89～3.33dtex, 3701f～4620f under 1100～1500 meters/minute of spinning technique speed with normal polyester melt (the inherent viscosity scope is 0.63～0.65), fracture strength CV value≤12% of raw tow, extension at break CV value≤11%; This raw tow passes through water bath more earlier through first drawing machine, and the water bath temperature controlling range is 65～70 ℃, through second drawing machine, finishes one drawing-off, draw ratio 2.4～3.2; Pass through the Steam Heating case afterwards, 90～120 ℃ of steam chest temperature controlling range, again through 18 roller tension-setting machines, setting roller surface temperature control scope 〉=210 ℃, eliminate residual stress, finish two road drawing-offs, make strand obtain whole orientations of its molecular structure, two road draw ratios 1.5～1.05; Curl 80～110 ℃ of the temperature controlling range of curling again through crimper; Silk after curling is cooled to below 75 ℃ by the relaxation heat setting machine, and is evenly cut off after the drying.Raw tow in the processing of this process route, but have good drawdown, the finished fiber of making has performances such as high strength, low elongation and low heat shrinkage.Its production run is stable, makes polyester staple fiber and can be applicable to multi-field.
Embodiment one:
With specification 133dtex/3780f, fracture strength CV value≤12%, the raw tow of extension at break CV value≤11% is that 70 ℃ the water bath and second drawing machine carries out drawing-off, draw ratio 1: 3.04 through first drawing machine with temperature; Entering temperature and be behind 110 ℃ the Steam Heating case through roll surface temperature is that 217 ℃ 18 roller tension-setting machines carry out two road drawing-offs, draw ratio 1: 1.16; Enter the 3rd drawing machine then and remain drawing-off, draw ratio 1: 0.998; The curling temperature of process is that the silk after 90 ℃ crimper curls is cooled to below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.The properties of product of producing are good, and the physical index of gained silk sees Table 1.
Embodiment two:
With specification 1.50dtex/3780f, fracture strength CV value≤12%, the raw tow of extension at break CV value≤11% is that 72 ℃ the water bath and second drawing machine carries out drawing-off, draw ratio 1: 3.02 through first drawing machine with temperature; Entering temperature and be behind 115 ℃ the Steam Heating case through roll surface temperature is that 210 ℃ 18 roller tension-setting machines carry out the secondary drawing-off, draw ratio 1: 1.14; Enter the 3rd drawing machine then and remain drawing-off, draw ratio 1: 0.998; The curling temperature of process is that the silk after 90 ℃ crimper curls is cooled to below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.The properties of product of producing are good, and the physical index of gained silk sees Table 1.
Embodiment three:
With specification 1.56dtex/4250f, fracture strength CV value≤12%, the raw tow of extension at break CV value≤11% is that 75 ℃ the water bath and second drawing machine carries out drawing-off, draw ratio 1: 3.0 through first drawing machine with temperature; Entering temperature and be behind 117 ℃ the Steam Heating case through roll surface temperature is that 210 ℃ 18 roller tension-setting machines carry out two road drawing-offs, draw ratio 1: 1.18; Enter the 3rd drawing machine then and remain drawing-off, draw ratio 1: 0.995; The curling temperature of process is that the silk after 95 ℃ crimper curls is cooled to below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.The properties of product of producing are good, and the physical index of gained silk sees Table 1.
The polyester staple fiber finished silk performance indications contrast that table 1 the present invention and prior art are made
*
| Sample | Fiber number (dtex) | Fracture strength (cN/dtex) | Elongation at break (%) | Dry-hot shrinkage (180 ℃, 30min) |
| Contrast sample one | 1.56 | 5.31 | 29.8 | 8.6 |
| Contrast sample two | 1.56 | 4.76 | 31.2 | 10.7 |
| Embodiment one | 1.33 | 6.42 | 18.3 | 4.4 |
| Embodiment two | 1.50 | 5.95 | 22.3 | 4.7 |
| Embodiment three | 1.56 | 5.74 | 24.1 | 6.1 |
*Contrast sample one be a flatness polyester staple fiber finished silk by force among the 1.56dtex (spinnerets hole count 3456) that produces of domestic certain terylene enterprise.
*Contrast sample two is the general cotton type polyester staple fiber finished silk of 1.56dtex (spinnerets hole count 2226) that domestic certain terylene enterprise produces.
The present invention makes conventional undrafting wire bundle carry out a drawing-off by the water bath between first drawing machine and second drawing machine; Carry out the secondary drawing-off by the steam chest between second drawing machine and the 18 roller tension-setting machines, realize the nervous HEAT SETTING of high temperature; Remain drawing-off by the 3rd drawing machine then; Curl by crimper; Carry out the high temperature relaxation heat setting by the relaxation heat setting machine again.
The present invention and in the past process route comparison, obtained following effect:
The routine of employing conventional polyester melt (section) spinning is the drawing-off raw tow not, and raw material sources are extensive. The spinning process for cooling without specific (special) requirements, but there is certain requirement to the quality uniformity of undrafting wire: fracture strength CV value≤12%, extension at break CV value≤11%. After undrafting wire is processed through this process route, have good drawability, the finished fiber fracture strength high (〉=6.0cN/dtex), elongation at break low (≤25%), dry-hot shrinkage low (＜8%), production run is steady, substantially without double-length and super over-length fibre.
Employing is with the nervous heat setting process of 18 rollers of U-shaped heating circuit, and the quality of counter extensioin fiber is very favourable with the fiber species of producing different Denier range. Adopt the cascade flash system can save～30% steam consumption economic benefits.
Claims (5)
1, a kind of preparation method of high-strength flatness polyester staple fiber.It is characterized by: be raw material with the raw tow, successively through the nervous HEAT SETTING of one drawing-off, two road drawing-offs, 18 rollers, three road drawing-offs, curl, relaxation heat setting, cut-out operation process produce.
2, the preparation method of a kind of high-strength flatness polyester staple fiber according to claim 1, it is characterized in that: described raw tow is that inherent viscosity is 0.63～0.65 normal polyester melt, makes the raw tow of 0.89～3.33dtex, 3701f～4620f under the condition of 1100～1500 meters/minute of spinning technique speed.Fracture strength CV value≤12% of raw tow, extension at break CV value≤11%; Carry out 65～75 ℃ of water bath temperature controlling range, one draw ratio 2.4～3.2 in the water bath of one drafting process of this raw tow between first drawing machine and second drawing machine; Carry out in the Steam Heating case of two road drawing-offs between second drawing machine and 18 roller tension-setting machine I districts, make strand obtain whole orientations of its molecular structure, 90～120 ℃ of Steam Heating oven temperature, degree control ranges, two road draw ratios 1.5～1.05; Carry out drying and HEAT SETTING, make fiber have certain fracture strength and elongation at break, setting roller surface temperature control scope 〉=210 ℃ through tension-setting machine II～IV district; Finish the residue drawing-off through the 3rd drawing machine again, draw ratio 1.0～0.98; Curl 80～110 ℃ of the temperature controlling range of curling then through crimper; Silk after curling is cooled to temperature to eliminate residual stress below 75 ℃ by the relaxation heat setting machine, and is evenly cut off after the drying.
The warm-up mill of 18 roller tension-setting machines adopts a kind of special U type heating circuit, makes roll surface temperature even.The Steam Heating of this setting machine adopts middle pressure steam (2.5Mpa) and low-pressure steam (1.0Mpa).It both can regulate nervous setting roller surface temperature arbitrarily according to technological requirement in certain temperature range by four flash tanks and four groups of cascade flash systems that control valve is formed of varying in size, and it is all even stable that roll surface temperature keeps; Can make full use of the indirect steam that condensed water waste heat that nervous HEAT SETTING comes out produces again and incorporate the workshop steam pipe system again into, can save～30% process steam consumption.
3, the preparation method of a kind of high-strength flatness polyester staple fiber according to claim 2 is characterized in that: with specification is 1.33dtex/3780f, fracture strength CV value≤12%, the raw tow of extension at break CV value≤11%; Through first drawing machine, temperature is 70 ℃ a water bath successively, and second drawing machine carries out one drawing-off, draw ratio 1: 3.04; Be 110 ℃ Steam Heating case then through excess temperature, the setting roller surface temperature is 217 ℃ 18 roller tension-setting machines, carries out two road drawing-offs, draw ratio 1: 1.16; Remain drawing-off through the 3rd drawing machine again, draw ratio 1: 0.998; The curling temperature of process is that the silk after 90 ℃ crimper curls is cooled to temperature below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.
4, the preparation method of a kind of high-strength flatness polyester staple fiber according to claim 2 is characterized in that: with specification is 1.50dtex/3780f, fracture strength CV value≤12%, the raw tow of extension at break CV value≤11%; Through first drawing machine, temperature is 72 ℃ a water bath successively, and second drawing machine carries out one drawing-off, draw ratio 1: 3.02; Be 115 ℃ Steam Heating case then through excess temperature, the setting roller surface temperature is 210 ℃ 18 roller tension-setting machines, carries out two road drawing-offs, draw ratio 1: 1.14; Remain drawing-off through the 3rd drawing machine again, draw ratio 1: 0.998; The curling temperature of process is that the silk after 90 ℃ crimper curls is cooled to temperature below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.
5, the preparation method of a kind of high-strength flatness polyester staple fiber according to claim 2 is characterized in that: with specification is 1.56dtex/4250f, fracture strength CV value≤12%, the raw tow of extension at break CV value≤11%; Through first drawing machine, temperature is 75 ℃ a water bath successively, and second drawing machine carries out one drawing-off, draw ratio 1: 3.0; Be 117 ℃ Steam Heating case then through excess temperature, the setting roller surface temperature is 210 ℃ 18 roller tension-setting machines, carries out two road drawing-offs, draw ratio 1: 1.18; Remain drawing-off through the 3rd drawing machine again, draw ratio 1: 0.995; The curling temperature of process is that the silk after 95 ℃ crimper curls is cooled to temperature below 75 ℃ through the relaxation heat setting machine again, and is cut off after the even drying.
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| CNB2004100536053A CN100422400C (en) | 2004-08-10 | 2004-08-10 | High-strength low-extension polyester staple fiber preparation method |
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| CNB2004100536053A CN100422400C (en) | 2004-08-10 | 2004-08-10 | High-strength low-extension polyester staple fiber preparation method |
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| CN85100885A (en) * | 1985-04-01 | 1985-12-20 | 中国科学院化学研究所 | Polyacrylic technology for high speed spinning |
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| DE10136255B4 (en) * | 2001-07-25 | 2005-05-04 | Helsa-Werke Helmut Sandler Gmbh & Co. Kg | Device for producing fibers with improved arrangement of the spray electrodes |
| CN1303266C (en) * | 2003-05-08 | 2007-03-07 | 中国石化仪征化纤股份有限公司 | Manufacture of high tenacity low-stretch polyester filaments |
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