CN105002579A - High-hollowness-degree fine-denier polyester filament yarn and preparation method thereof - Google Patents
High-hollowness-degree fine-denier polyester filament yarn and preparation method thereof Download PDFInfo
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- CN105002579A CN105002579A CN201510251818.5A CN201510251818A CN105002579A CN 105002579 A CN105002579 A CN 105002579A CN 201510251818 A CN201510251818 A CN 201510251818A CN 105002579 A CN105002579 A CN 105002579A
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Abstract
The invention relates to the technical field of synthetic fiber, in order to solve the problem that the reduction of the degree of the fineness of single fiber and the increase of the degree of hollowness cannot be achieved at the same time easily, the invention provides high-hollowness-degree fine-denier polyester filament yarn and a preparation method thereof, the degree of fineness of the high-hollowness-degree fine-denier polyester filament yarn is 1-1.67 dtex, and the degree of hollowness of the high-hollowness-degree fine-denier polyester filament yarn is 30-40%. According to the invention, the contradiction between the degree of fineness and the degree of hollowness is solved, the thermal insulation performance of the fiber can be guaranteed, the spinnability and processability of the fiber can be improved, and at the same time, the production process is relatively stable.
Description
Technical field
The present invention relates to synthetic fiber technical field, relate in particular to a kind of preparation method of high hollow microdenier polyester fibers and obtained high hollow fine-denier polyester long filament.
Background technology
Polyester fiber is most widely used in three large synthetic fiber because its excellent mechanical property, excellent dyeability and cost are lower.Thin dawn doughnut feel hard feel that is careful, thick dawn doughnut as none, more have lightweight and heat preservation property concurrently, therefore, become demand fiber species widely, be widely used in polar fleece, insulated cold wear, winter sports clothes, knitted fleece, woollen blanket, the fields such as cold-proof underwear, sleeping bag, ready-made clothes, cap can be made into.
For obtaining light, warm, soft characteristic, can set about from reduction single fiber fiber number and raising degree of hollowness aspect.Therefore, under the prerequisite of not sacrificing output, reduce single fiber fiber number and improve hollow rate simultaneously, be the bottleneck that high hollow microdenier polyester fibers needs breakthrough, as US Patent No. 5,487,859 and european patent application file EP 0 860 523 A2 in the effort of disclosed this respect.But, with current technology, make the degree of hollowness of microdenier polyester fibers generally on the low side due to the precision restriction of spinnerets and the restriction of conventional spinning processes.Even if the thin dawn hollow core staple fibers of patent No. CN200510029778 can accomplish the fiber number of 1.67dtex, degree of hollowness is less than 20%, thus the amount of losing is light and the real meaning of heat insulating ability.
Summary of the invention
Reduce single fiber fiber number for solving and improve the more difficult problem simultaneously realized of hollow rate, the present invention proposes a kind of high hollow fine-denier polyester long filament and preparation method thereof, the invention solves the contradiction of fiber number and degree of hollowness, the heat-insulating property of fiber is ensured, improve spinnability and the processability of fiber, production process is relatively stable simultaneously simultaneously.
The present invention is achieved by the following technical solutions: a kind of high hollow fine-denier polyester long filament, and described high hollow fine-denier polyester filament linear-density is 1 ~ 1.67dtex, degree of hollowness is 30 ~ 40%.
For reaching high hollow fine-denier polyester long filament of the present invention, by adding two water baths in thin dawn hollow polyester fibre spinning technique, before being reeled up horizontal super drawing process is carried out to hollow fine count fiber, improve the degree of hollowness of fiber, thus solve the contradiction of fiber number and degree of hollowness, the heat-insulating property of fiber is ensured, improves spinnability and the processability of fiber simultaneously.
The preparation method of described high hollow fine-denier polyester long filament is following steps: polyester slice through screw extruder, measuring pump, spinning manifold, spinnerets, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, winding, first break draft, obtains high hollow fine-denier polyester long filament successively.The present invention has added boiling water bath A, cold bath B and another strong coldblast device C between boundling and winding, does not need to expend more cost and just can produce high hollow microdenier polyester fibers of fine quality in production process.
As preferably, the temperature of spinning manifold is 280 ~ 282 DEG C.The height of spinning temperature directly affects rheological property and the relative molecular mass of melt, determines mobile performance and the surface tension of melt, therefore very large on the degree of hollowness impact of high hollow microdenier polyester fibers.Spinning temperature is high, and melt viscosity is little, melt after going out spinneret orifice expanded phenomenon greatly reduce, melt-forming resistance declines, and surface tension also declines thereupon, makes melt stream produce surperficial atrophy, thus chamber portion is diminished, and the degree of hollowness of the fiber of spinning reduces; Spinning temperature is low, then melt viscosity is large, and melt-forming resistance and surface tension greatly, are conducive to the formation of hollow.But melt temperature is too low, melt shearing stress in spinneret orifice increases, and causes flow instabilities, produces hardhead silk, filament.
As preferably, the spinneret orifice of spinnerets is made up of four arcs slit, and cylindrical, the inner circle of spinneret orifice are concentric circles, point concentric circles such as four arcs narrow slit structure, the outside diameter D of described spinneret orifice
2be 0.5 ~ 0.8mm, the interior circular diameter D of spinneret orifice
1for: 0.3mm ~ 0.6mm, interior circular diameter D
1be less than outside diameter D
2, circular arc spacing L is 0.05mm ~ 0.07mm.As more preferably, hole outside diameter D
2for: 0.6mm ± 0.01mm; Circular diameter D in hole
1for: 0.5mm ± 0.01mm; The L of circular arc spacing is of a size of: 0.06mm ± 0.01mm.Spinneret pore structure of the present invention, effectively improve fiber cross section be closed into power while, ensure that hollow fine count fiber has higher degree of hollowness.
As preferably, the wind speed 0.6 ~ 1.3m/s of coldblast, wind-warm syndrome 20 ~ 24 DEG C, blowing distance 90 ~ 100mm, blast is 600Pa.The process conditions of cooling forming for the rheological behavior spinning melt stream in journey, as the physical parameters such as elongational flow viscosity, tensile stress have a significant impact.Because the thermal conductivity factor of air is low, the heat transfer effect of wind speed on melt stream and surrounding air is caused to affect larger, along with the cooling condition such as increase, wind-warm syndrome reduction of wind speed aggravates, melt stream solidification rate is accelerated, make to have little time atrophy and rapid curing spinning the chamber portion that journey is formed, be conducive to the formation of doughnut internal cavity, the hollowness of fibre made is high.
As preferably, boiling water bath A comprises tank, temperature control sensor, intake-outlet.Water fluidized state is kept in boiling water bath A.The adjustable in length of boiling water bath A, makes strand immerse length and is preferably 1.5 ~ 2m.
As preferably, cold water bath B comprises tank, intake-outlet.Water temperature is constant in normal temperature, and intake-outlet is communicated with makes water keep flowing.The temperature of cold water bath B is as far as possible more low better, but under batch production regulates, also needs to consider the equipment required for water K cryogenic treatment and energy loss, therefore adopts the cooling water under normal temperature, but needs circulation temperature lowering.
As preferably, the wind speed 1 ~ 1.5m/s of strong coldblast C, wind-warm syndrome 20 ~ 24 DEG C, the object of distance 60 ~ 70mm, strong coldblast C is in order to rapid draing strand, and strengthens the effect of cold bath B.
As preferably, winding speed is 1000 ~ 3000m/min.Winding speed is more preferably 1500 ~ 2500m/min.Due to adding of boiling water bath and cold bath, make the winding speed of high hollow microdenier polyester fibers can not be too high, the degree of orientation of too high then fiber be large, is unfavorable for the generation that hollow chamber air expands, and can not improves hollowness of fibre.
As preferably, draft speed 500 ~ 900 m/s, drafting multiple 4.00 ~ 4.43, drawing temperature 100 ~ 140 DEG C.Be more preferably draft speed 700 m/s, drafting multiple 4.43, drawing temperature 120 DEG C.The first break draft multiple of high hollow microdenier polyester fibers is also comparatively large on the degree of hollowness impact of fiber, and the degree of hollowness of fiber is along with the raising of draw ratio, and fiber number reduces, and the wall thickness of fiber is thinning, and the sectional area of fiber is reduced.Although chamber portion attenuates at fiber, wall thickening while, sectional area reduces to some extent, and reduction amplitude does not have the large of weakened fiber walls, therefore the degree of hollowness of final fiber increases.
The present invention utilizes osmosis two kinds of principles of expanding with heat and contract with cold of air and water.Boiling water bath A adds the temperature that can change hollow fiber cavity air, fiber lumens air is expanded, and then its degree of hollowness is raised, boiling water enters fibrous inside by osmosis simultaneously, fiber outer wall is swollen open, cold bath B makes the inner chamber air fast cooling of high temperature and dry through strong coldblast C.Like this not affecting on the basis of fibre number, by physical means, in spinning process, improve the degree of hollowness of fiber.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention makes the heat-insulating property of fiber be ensured, improves spinnability and the processability of fiber simultaneously, meets the demand of thin dawn doughnut market for thin dawn and high hollow;
(2) production process is relatively stable.
Accompanying drawing explanation
Fig. 1 is the process chart of polyester high hollow staple of thin denier production method of the present invention;
Fig. 2 is the sectional view of the thin dawn doughnut that conventional method obtains;
Fig. 3 is the sectional view of the high hollow fine count fiber that the present invention obtains;
Fig. 4 is spinneret plate structure schematic diagram of the present invention.
Detailed description of the invention
Be described in further detail of the present invention below by embodiment.
Embodiment 1
The production technological process of high hollow microdenier polyester fibers as shown in Figure 1, polyester slice through screw extruder, measuring pump, spinning manifold, spinnerets, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, winding, first break draft, obtains high hollow fine-denier polyester long filament successively.
Wherein, the temperature of spinning manifold is 282 DEG C.Spinneret plate structure as shown in Figure 4, the outside diameter D of the spinneret orifice of spinnerets
2for 0.6mm, the interior circular diameter D of spinneret orifice
1for: 0.4mm, circular arc spacing L are 0.07mm.The wind speed 1.3m/s of coldblast, wind-warm syndrome 24 DEG C, blowing distance 100mm, boiling water bath A comprises tank, temperature control sensor, intake-outlet, keep water fluidized state in boiling water bath A, make strand immerse length and be preferably 1.5m, cold water bath B comprises tank, intake-outlet.Water temperature is constant in normal temperature, and intake-outlet is communicated with makes water keep flowing.The wind speed 1.5m/s of strong coldblast C, wind-warm syndrome 20 DEG C, distance 60mm, winding speed is 2500m/min.Hauling speed 800 m/s, drafting multiple, drawing temperature 140 DEG C.
Embodiment 2
The production technological process of high hollow microdenier polyester fibers as shown in Figure 1, polyester slice through screw extruder, measuring pump, spinning manifold, spinnerets, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, winding, first break draft, obtains high hollow fine-denier polyester long filament successively.
Wherein, the temperature of spinning manifold is 280 DEG C.Spinneret plate structure as shown in Figure 4, the outside diameter D of the spinneret orifice of spinnerets
2for 0.5mm, the interior circular diameter D of spinneret orifice
1for: 0.3mm, circular arc spacing L are 0.05mmmm.The wind speed 0.6m/s of coldblast, wind-warm syndrome 20 DEG C, blowing distance 90mm, boiling water bath A comprises tank, temperature control sensor, intake-outlet, keeps water fluidized state in boiling water bath A, and make strand immerse length and be preferably 2m, cold water bath B comprises tank, intake-outlet.Water temperature is constant in normal temperature, and intake-outlet is communicated with makes water keep flowing.The wind speed 1.5m/s of strong coldblast C, wind-warm syndrome 20 DEG C, distance 60mm, winding speed is 1500m/min.Hauling speed 600 m/s, drafting multiple 4.43, drawing temperature 120 DEG C.
Embodiment 3
The production technological process of high hollow microdenier polyester fibers as shown in Figure 1, polyester slice through screw extruder, measuring pump, spinning manifold, spinnerets, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, winding, first break draft, obtains high hollow fine-denier polyester long filament successively.
Wherein, the temperature of spinning manifold is 281 DEG C.Spinneret plate structure as shown in Figure 4, the outside diameter D of the spinneret orifice of spinnerets
2for 0.6mm, the interior circular diameter D of spinneret orifice
1for: 0.4mm, circular arc spacing L are 0.06mm.The wind speed 1.2m/s of coldblast, wind-warm syndrome 22 DEG C, blowing distance 90mm, boiling water bath A comprises tank, temperature control sensor, intake-outlet, keeps water fluidized state in boiling water bath A, and make strand immerse length and be preferably 2m, cold water bath B comprises tank, intake-outlet.Water temperature is constant in normal temperature, and intake-outlet is communicated with makes water keep flowing.The wind speed 1.3m/s of strong coldblast C, wind-warm syndrome 22 DEG C, distance 65mm, winding speed is 1000m/min.Hauling speed 500 m/s, drafting multiple 4.2, drawing temperature 100 DEG C.
Comparative example
As shown in Figure 3, polyester filament fiber number is 1 ~ 1.67dtex to the sectional view of the high hollow microdenier polyester fibers obtained by the present invention, degree of hollowness is 30 ~ 40%.Adopt the sectional view of the thin dawn hollow polyester fibre obtained by common process as shown in Figure 2, hollow microdenier polyester fibers degree of hollowness of the present invention improves obviously.
Claims (10)
1. a high hollow fine-denier polyester long filament, is characterized in that, described high hollow fine-denier polyester filament linear-density is 1 ~ 1.67dtex, degree of hollowness is 30 ~ 40%.
2. the preparation method of a high hollow fine-denier polyester long filament as claimed in claim 1, it is characterized in that, described preparation method is following steps: polyester slice through screw extruder, measuring pump, spinning manifold, spinnerets, coldblast, draw-off godet, boiling water bath A, pneumatics roller, cold water bath B, strong coldblast C, winding, first break draft, obtains high hollow fine-denier polyester long filament successively.
3. the preparation method of high hollow fine-denier polyester long filament according to claim 2, is characterized in that, the temperature of spinning manifold is 280 ~ 282 DEG C.
4. the preparation method of high hollow fine-denier polyester long filament according to claim 2, it is characterized in that, the spinneret orifice of spinnerets is made up of four arcs slit, the outside diameter of described spinneret orifice is 0.5 ~ 0.8mm, the interior circular diameter of spinneret orifice is: 0.3mm ~ 0.6mm, and circular arc spacing is 0.05mm ~ 0.07mm.
5. the preparation method of high hollow fine-denier polyester long filament according to claim 2, is characterized in that, the wind speed 0.6 ~ 1.3m/s of coldblast, wind-warm syndrome 20 ~ 24 DEG C, blowing distance 90 ~ 100mm.
6. the preparation method of high hollow fine-denier polyester long filament according to claim 2, it is characterized in that, boiling water bath A comprises tank, temperature control sensor, intake-outlet.
7. the preparation method of high hollow fine-denier polyester long filament according to claim 2, it is characterized in that, cold water bath B comprises tank, intake-outlet.
8. the preparation method of high hollow fine-denier polyester long filament according to claim 2, is characterized in that, the wind speed 1 ~ 1.5m/s of strong coldblast C, wind-warm syndrome 20 ~ 24 DEG C, distance 60 ~ 70mm.
9. the preparation method of high hollow fine-denier polyester long filament according to claim 2, it is characterized in that, winding speed is 1000 ~ 3000m/min.
10. the preparation method of high hollow fine-denier polyester long filament according to claim 2, is characterized in that, hauling speed 500 ~ 900 m/s, drafting multiple 4.00 ~ 4.43, drawing temperature 100 ~ 140 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107208321A (en) * | 2015-01-26 | 2017-09-26 | 东丽株式会社 | Polyester doughnut orbicule |
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| GB796544A (en) * | 1954-10-13 | 1958-06-11 | British Celanese | Improvements in the manufacture of artificial filaments and like products |
| JPH1147218A (en) * | 1997-07-30 | 1999-02-23 | Matsushita Electric Ind Co Ltd | Bathing apparatus |
| CN1536104A (en) * | 2003-04-11 | 2004-10-13 | 南亚塑胶工业股份有限公司 | Fine-denier polyester hollow filament spinning method and its produced pilament |
| CN1743515A (en) * | 2005-09-19 | 2006-03-08 | 上海联吉合纤有限公司 | Dacron thin-denier high-hollow short fiber and its production method |
| CN101302656A (en) * | 2008-06-10 | 2008-11-12 | 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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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB796544A (en) * | 1954-10-13 | 1958-06-11 | British Celanese | Improvements in the manufacture of artificial filaments and like products |
| JPH1147218A (en) * | 1997-07-30 | 1999-02-23 | Matsushita Electric Ind Co Ltd | Bathing apparatus |
| CN1536104A (en) * | 2003-04-11 | 2004-10-13 | 南亚塑胶工业股份有限公司 | Fine-denier polyester hollow filament spinning method and its produced pilament |
| CN1743515A (en) * | 2005-09-19 | 2006-03-08 | 上海联吉合纤有限公司 | Dacron thin-denier high-hollow short fiber and its production method |
| CN101302656A (en) * | 2008-06-10 | 2008-11-12 | 中国石化仪征化纤股份有限公司 | Production method of fine denier hollow polyester staple fiber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107208321A (en) * | 2015-01-26 | 2017-09-26 | 东丽株式会社 | Polyester doughnut orbicule |
| CN107208321B (en) * | 2015-01-26 | 2020-02-28 | 东丽株式会社 | Polyester hollow fiber spheroids |
| 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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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. |
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