CN105002579B - A kind of high hollow fine-denier polyester long filament and preparation method thereof - Google Patents
A kind of high hollow fine-denier polyester long filament and preparation method thereof Download PDFInfo
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- CN105002579B CN105002579B CN201510251818.5A CN201510251818A CN105002579B CN 105002579 B CN105002579 B CN 105002579B CN 201510251818 A CN201510251818 A CN 201510251818A CN 105002579 B CN105002579 B CN 105002579B
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Abstract
The present invention relates to synthetic fibers technical field, it is more difficult while the problem of realizing with improving hollow rate to solve reduction single fiber fiber number, the present invention proposes a kind of high hollow fine-denier polyester long filament and preparation method thereof, described high hollow fine-denier polyester filament linear-density is that 1 ~ 1.67dtex, degree of hollowness are 30 ~ 40%, the present invention solves fiber number and the contradiction of degree of hollowness, the heat-insulating property of fiber is set to ensure, while the spinnability and processability of fiber are improved, while production process is stablized relatively.
Description
Technical field
The present invention relates to synthetic fibers technical field, a kind of preparation side of high hollow microdenier polyester fibers is related in particular to
Method and obtained high hollow fine-denier polyester long filament.
Background technology
Polyester fiber because its excellent mechanical property, excellent dyeability and cost it is relatively low and in three big synthetic fibers should
With most wide.Fine-denier doughnut feel is careful, hard feel without general thick denier doughnut, more has lightweight and insulation concurrently special
Property, therefore, it has also become the extensive fiber species of demand, be widely used in polar fleece, insulated cold wear, winter sports clothes, it is napping knitted
Thing, woollen blanket, the fields such as cold-proof underwear, sleeping bag, ready-made clothes, cap can be made into.
To obtain light, warm, soft characteristic, it can set about from reduction single fiber fiber number and in terms of improving degree of hollowness.Therefore, not
On the premise of sacrificing yield, reduction single fiber fiber number simultaneously improves hollow rate simultaneously, and as high hollow microdenier polyester fibers need to break through
Bottleneck, such as United States Patent (USP) US 5, this side disclosed in 487,859 and european patent application file EP 0 860 523 A2
The effort in face.But, for current technology, made thin due to the precision limitation and the limitation of conventional spinning processes of spinneret
The degree of hollowness of denier polyester fiber is generally relatively low.Even if patent No. CN200510029778 fine-denier hollow core staple fibers can accomplish
1.67dtex fiber number, degree of hollowness is less than 20%, so that light and heat insulating ability the real meaning of the amount of losing.
The content of the invention
It is more difficult while the problem of realizing, the present invention proposes a kind of senior middle school with improving hollow rate to solve reduction single fiber fiber number
Empty fine-denier polyester long filament and preparation method thereof, the present invention solves fiber number and the contradiction of degree of hollowness, obtains the heat-insulating property of fiber
To ensure, while the spinnability and processability of fiber are improved, while production process is stablized relatively.
The present invention is achieved by the following technical solutions：A kind of high hollow fine-denier polyester long filament, described is high hollow thin
Denier PFY fiber number is that 1 ~ 1.67dtex, degree of hollowness are 30 ~ 40%.
To reach high hollow fine-denier polyester long filament of the present invention, by fine-denier hollow polyester fibre spinning technique
Two water baths are added, horizontal super drawing is carried out to hollow fine count fiber before being reeled up is handled, and improves the degree of hollowness of fiber, from
And solve fiber number and the contradiction of degree of hollowness, the heat-insulating property of fiber is ensured, at the same improve fiber spinnability and
Processability.
The preparation method of described high hollow fine-denier polyester long filament is following steps：Polyester slice is successively through Screw Extrusion
Machine, measuring pump, spinning manifold, spinneret, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C,
Winding, first break draft, obtain high hollow fine-denier polyester long filament.The present invention has added boiling water bath A, cold bath B between boundling and winding
With another strong cold blowing wind apparatus C, in production process and high hollow of fine quality with regard to that can produce of more costs need not be expended
Microdenier polyester fibers.
Preferably, the temperature of spinning manifold is 280 ~ 282 DEG C.The height of spinning temperature directly affects the rheological characteristic of melt
Energy and relative molecular mass, determine the mobile performance and surface tension of melt, therefore in high hollow microdenier polyester fibers
Reciprocal of duty cycle influence is very big.Spinning temperature is high, and melt viscosity is small, and melt goes out expanded phenomenon after spinneret orifice and substantially reduced, melt-forming resistance
Power declines, and surface tension also declines therewith so that melt stream produces surface atrophy, so that chamber portion diminishes, spinning
The degree of hollowness reduction of fiber；Spinning temperature is low, then melt viscosity is big, and melt-forming resistance and surface tension are big, are conducive to hollow
Formation.But melt temperature is too low, melt shearing stress in spinneret orifice increases, and causes flow instabilities, produces hardhead silk, thin
Silk.
Preferably, the spinneret orifice of spinneret is made up of four arcses slit, cylindrical, the inner circle of spinneret orifice are with one heart
Circle, four arcses narrow slit structure etc. point concentric circles, the outside diameter D of described spinneret orifice2For 0.5 ~ 0.8mm, spinneret orifice it is interior
Circular diameter D1For：0.3mm ~ 0.6mm, interior circular diameter D1Less than outside diameter D2, circular arc spacing L is 0.05mm ~ 0.07mm.As
It is further preferred that hole outside diameter D2For：0.6mm±0.01mm；Circular diameter D in hole1For：0.5mm±0.01mm；The L chis of circular arc spacing
It is very little to be：0.06mm±0.01mm.The spinneret pore structure of the present invention, is effectively improving the same of the closure success rate of fiber cross section
When, it is ensured that hollow fine count fiber has higher degree of hollowness.
Preferably, 0.6 ~ 1.3m/s of wind speed of coldblast, 20 ~ 24 DEG C of wind-warm syndrome, dry 90 ~ 100mm of distance, and blast is
600Pa.The process conditions of cooling forming are for the rheological behavior of melt stream in spinning journey, such as elongational flow viscosity, tensile stress
Have a significant impact etc. physical parameter.Because the thermal conductivity factor of air is low, heat exchange of the wind speed to melt stream and surrounding air is caused
Influential effect is larger, and as the cooling conditions such as increase, the wind-warm syndrome reduction of wind speed aggravate, melt stream solidification rate is accelerated so that
Have little time atrophy and rapid curing spinning the chamber portion that is formed in journey, be conducive to the formation of doughnut internal cavity, be made
Hollowness of fibre is high.
Preferably, boiling water bath A includes tank, temperature control sensor, intake-outlet.Boiling water is kept in boiling water bath A
State.Boiling water bath A adjustable in length, it is preferably 1.5 ~ 2m strand is immersed length.
Preferably, cold water bath B includes tank, intake-outlet.Water temperature is constant in normal temperature, and intake-outlet connection protects water
Hold flowing.It is more low better that cold water bath B temperature is tried one's best, but under batch production regulation, in addition it is also necessary to consider water low-temperature treatment institute
The equipment and energy loss needed, therefore using the cooling water under normal temperature, but need circulation temperature lowering.
Preferably, strong coldblast C 1 ~ 1.5m/s of wind speed, 20 ~ 24 DEG C of wind-warm syndrome, 60 ~ 70mm of distance, strong coldblast C's
Purpose is, for rapid draing strand, and cold bath B effect to be strengthened.
Preferably, winding speed is 1000 ~ 3000m/min.Winding speed is more preferably 1500 ~ 2500m/min.Due to
Boiling water bath and the addition of cold bath so that the winding speed of high hollow microdenier polyester fibers can not be too high, too high, fiber take
It is big to degree, it is unfavorable for the generation of hollow chamber air expansion, and hollowness of fibre can not be improved.
Preferably, the m/s of draft speed 500 ~ 900, drafting multiple 4.00 ~ 4.43,100 ~ 140 DEG C of drawing temperature.It is more excellent
Elect the m/s of draft speed 700, drafting multiple 4.43,120 DEG C of drawing temperature as.The first break draft multiple of high hollow microdenier polyester fibers
Degree of hollowness influence on fiber is also larger, and the degree of hollowness of fiber is with the raising of draw ratio, and fiber number is reduced, and the wall thickness of fiber becomes
It is thin, reduce the sectional area of fiber.Although chamber portion is while fiber attenuates, wall is thickening, sectional area has been reduced, and is subtracted
It is big without weakened fiber walls by a small margin, therefore the degree of hollowness increase of final fiber.
The present invention utilizes two kinds of principles of osmosis expanded with heat and contract with cold with water of air.Boiling water bath A addition can change
The temperature of hollow fiber cavity air, expand fiber lumens air, and then raises its degree of hollowness, while boiling water is by oozing
Effect enters fibrous inside thoroughly, fiber outer wall is swollen and opens, cold bath B is to make the inner chamber air fast cooling of high temperature and pass through
Strong coldblast C is dried.So on the basis of fibre number is not influenceed, by physical means, fiber is improved in spinning process
Degree of hollowness.
Compared with prior art, the beneficial effects of the invention are as follows：
（1）The present invention enables the heat-insulating property of fiber to ensure, while improving the spinnability and processability of fiber, meets
Fine-denier doughnut market is for fine-denier and high hollow demand；
（2）Production process is stablized relatively.
Brief description of the drawings
Fig. 1 is the process chart of the high hollow staple of thin denier production method of polyester of the present invention；
Fig. 2 is the sectional view of fine-denier doughnut made from conventional method；
Fig. 3 is the sectional view of high hollow fine count fiber produced by the present invention；
Fig. 4 is spinneret plate structure schematic diagram of the invention；
In figure, 1：Winding bobbin, 2：Friction roller, 3：Seal wire rod, 4：High wind cold blowing, 5：Air pressure rod, 6：Draw-off godet, 7：Spinning
Case, 8：Coldblast, 9：Measuring pump, 10：Screw extruder, 11：Hopper, A：Boiling water bath, B：Cold bath, C：Strong coldblast.
Embodiment
Invention is described in further detail below by embodiment.
Embodiment 1
The production technological process of high hollow microdenier polyester fibers as shown in figure 1, polyester slice successively through screw extruder,
Measuring pump, spinning manifold, spinneret, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, volume
Around, first break draft, high hollow fine-denier polyester long filament is obtained.
Wherein, the temperature of spinning manifold is 282 DEG C.Spinneret plate structure as shown in figure 4, the spinneret orifice of spinneret it is cylindrical straight
Footpath D2For 0.6mm, the interior circular diameter D of spinneret orifice1For：0.4mm, circular arc spacing L are 0.07mm.The wind speed 1.3m/s of coldblast, wind
24 DEG C of temperature, blowing is apart from 100mm, and boiling water bath A includes keeping water in tank, temperature control sensor, intake-outlet, boiling water bath A
Fluidized state, makes strand immerse length preferably 1.5m, cold water bath B includes tank, intake-outlet.Water temperature is constant in normal temperature,
Intake-outlet connection makes water keep flowing.Strong coldblast C wind speed 1.5m/s, 20 DEG C of wind-warm syndrome, apart from 60mm, winding speed is
2500m/min.The m/s of hauling speed 800, drafting multiple, 140 DEG C of drawing temperature.
Embodiment 2
The production technological process of high hollow microdenier polyester fibers as shown in figure 1, polyester slice successively through screw extruder,
Measuring pump, spinning manifold, spinneret, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, volume
Around, first break draft, high hollow fine-denier polyester long filament is obtained.
Wherein, the temperature of spinning manifold is 280 DEG C.Spinneret plate structure as shown in figure 4, the spinneret orifice of spinneret it is cylindrical straight
Footpath D2For 0.5mm, the interior circular diameter D of spinneret orifice1For：0.3mm, circular arc spacing L are 0.05mmmm.The wind speed 0.6m/s of coldblast,
20 DEG C of wind-warm syndrome, blowing is apart from 90mm, and boiling water bath A includes keeping water in tank, temperature control sensor, intake-outlet, boiling water bath A
Fluidized state, makes strand immerse length preferably 2m, cold water bath B includes tank, intake-outlet.Water temperature is constant in normal temperature, enters
Delivery port connection makes water keep flowing.Strong coldblast C wind speed 1.5m/s, 20 DEG C of wind-warm syndrome, apart from 60mm, winding speed is
1500m/min.The m/s of hauling speed 600, drafting multiple 4.43,120 DEG C of drawing temperature.
Embodiment 3
The production technological process of high hollow microdenier polyester fibers as shown in figure 1, polyester slice successively through screw extruder,
Measuring pump, spinning manifold, spinneret, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, volume
Around, first break draft, high hollow fine-denier polyester long filament is obtained.
Wherein, the temperature of spinning manifold is 281 DEG C.Spinneret plate structure as shown in figure 4, the spinneret orifice of spinneret it is cylindrical straight
Footpath D2For 0.6mm, the interior circular diameter D of spinneret orifice1For：0.4mm, circular arc spacing L are 0.06mm.The wind speed 1.2m/s of coldblast, wind
22 DEG C of temperature, blowing is apart from 90mm, and boiling water bath A includes keeping water boiling in tank, temperature control sensor, intake-outlet, boiling water bath A
State is risen, strand is immersed length preferably 2m, cold water bath B includes tank, intake-outlet.Water temperature is constant in normal temperature, turnover
Mouth of a river connection makes water keep flowing.Strong coldblast C wind speed 1.3m/s, 22 DEG C of wind-warm syndrome, apart from 65mm, winding speed is 1000m/
min.The m/s of hauling speed 500, drafting multiple 4.2,100 DEG C of drawing temperature.
Comparative example
The sectional views of high hollow microdenier polyester fibers obtained by the present invention as shown in figure 3, PFY fiber number be 1 ~
1.67dtex, degree of hollowness are 30 ~ 40%.Using sectional view such as Fig. 2 institutes of the fine-denier hollow polyester fibre obtained by common process
Show, hollow microdenier polyester fibers degree of hollowness of the invention is obviously improved.
Claims (5)
1. a kind of preparation method of high hollow fine-denier polyester long filament, it is characterised in that described preparation method is following steps：It is poly-
Ester section successively through screw extruder, measuring pump, spinning manifold, spinneret, coldblast, draw-off godet, boiling water bath A, pneumatics roller,
Cold water bath B, strong coldblast C, winding, first break draft, obtain high hollow fine-denier polyester long filament；
0.6 ~ 1.3m/s of wind speed of coldblast, 20 ~ 24 DEG C of wind-warm syndrome, 90 ~ 100mm of blowing distance；
Boiling water bath A includes tank, temperature control sensor, intake-outlet；
Cold water bath B includes tank, intake-outlet；
Strong coldblast C 1 ~ 1.5m/s of wind speed, 20 ~ 24 DEG C of wind-warm syndrome, 60 ~ 70mm of distance,
Described high hollow fine-denier polyester filament linear-density is that 1 ~ 1.67dtex, degree of hollowness are 30 ~ 40%.
2. the preparation method of high hollow fine-denier polyester long filament according to claim 1, it is characterised in that the temperature of spinning manifold
Spend for 280 ~ 282 DEG C.
3. the preparation method of high hollow fine-denier polyester long filament according to claim 1, it is characterised in that the spinneret of spinneret
Hole is made up of four arcses slit, and the outside diameter of described spinneret orifice is 0.5 ~ 0.8mm, and the inner circle of spinneret orifice is a diameter of：
0.3mm ~ 0.6mm, circular arc spacing is 0.05mm ~ 0.07mm.
4. the preparation method of high hollow fine-denier polyester long filament according to claim 1, it is characterised in that winding speed is
1000~3000m/min。
5. the preparation method of high hollow fine-denier polyester long filament according to claim 1, it is characterised in that hauling speed 500 ~
900 m/s, drafting multiple 4.00 ~ 4.43,100 ~ 140 DEG C of drawing temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510251818.5A CN105002579B (en) | 2015-05-18 | 2015-05-18 | A kind of high hollow fine-denier polyester long filament and preparation method thereof |
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| WO2016121643A1 (en) * | 2015-01-26 | 2016-08-04 | 東レ株式会社 | Polyester hollow fiber spherical material |
| CN107012528A (en) * | 2017-04-08 | 2017-08-04 | 河南省龙都生物科技有限公司 | A kind of hollow polylactic acid short-fiber of cotton fine-denier and its production method |
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| GB796544A (en) * | 1954-10-13 | 1958-06-11 | British Celanese | Improvements in the manufacture of artificial filaments and like products |
| JP3834945B2 (en) * | 1997-07-30 | 2006-10-18 | 松下電器産業株式会社 | Bathing equipment |
| CN1333119C (en) * | 2003-04-11 | 2007-08-22 | 南亚塑胶工业股份有限公司 | Fine-denier polyester hollow filament spinning method and its produced pilament |
| CN100404732C (en) * | 2005-09-19 | 2008-07-23 | 上海联吉合纤有限公司 | Dacron thin-denier high-hollow short fiber and its production method |
| CN101302656B (en) * | 2008-06-10 | 2011-09-14 | 中国石化仪征化纤股份有限公司 | Production method of fine denier hollow polyester staple fiber |
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Effective date of registration: 20200402 Address after: 310000 no.635 Chuangye Road, Hongshan farm, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Yibi Chemical Fiber Co., Ltd Address before: 311228 Linjiang hi tech Industrial Park, Hangzhou, Zhejiang, Xiaoshan Patentee before: ZHEJIANG HENGYI HI-TECH MATERIALS Co.,Ltd. |