CN102453967A - Preparation method of hollow polyester fiber with controllable hollowness - Google Patents
Preparation method of hollow polyester fiber with controllable hollowness Download PDFInfo
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- CN102453967A CN102453967A CN2011102513592A CN201110251359A CN102453967A CN 102453967 A CN102453967 A CN 102453967A CN 2011102513592 A CN2011102513592 A CN 2011102513592A CN 201110251359 A CN201110251359 A CN 201110251359A CN 102453967 A CN102453967 A CN 102453967A
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Abstract
The invention relates to a preparation method of hollow polyester fiber with controllable hollowness. In the method, two screw extruders are used for respectively feeding materials for a cover/core spinneret plate assembly, a cover layer which is made of polyester and water-solubility polyester and a core layer which is water-solubility polyester are melted in a certain proportion for composite spinning, and then postprocessing processes are carried out to prepare polyester staple fiber; and fabric made of the obtained fiber is treated with an alkaline solution to remove the water-solubility polyester from the core layer and the cover layer, and thus the fiber is of a hollow structure, and lots of micropores, trenches and through holes are formed on inner and outer surfaces of the fiber at the same time. Since hollow holes are formed after the core layer is removed through melting, deformation of hollow holes, caused by extrusion in a stretching process in the preparation of hollow fiber spun with a profile hole spinneret plate spinning method, can be avoided, and hollowness is reduced; and moreover, through the change of the proportion of raw materials for spinning, the polyester fiber with controllable hollowness being 5-75% is prepared.
Description
Technical field
The present invention relates to a kind of preparation method of doughnut, the preparation method of many micropores hollow polyester staple fiber that particularly a kind of degree of hollowness is controlled
Background technology
Doughnut is a kind of important profiled filament that cross section has cavity vertically, and its hollow structure has comprised a large amount of still airs, makes fabric in light, and protecting dim performance has had raising to a certain extent than common homogeneity lining.The production of doughnut mainly is to adopt profile spinnerets such as circular arc, C type, multiple spot shape to make through melt spinning.Adopt profile spinneret spin processes spinning doughnut; Tensile stress can cause the crimp of fiber hollow hole in process of production; And the mechanism that in follow-up process, produces can cause fiber by further extruding equally; Cause the degree of hollowness of fiber to be difficult to improve, generally be no more than 20%.In order to improve the degree of hollowness of doughnut, through adopting special spinneretss such as article shape and circular arc combination, spin four holes, seven apertures in the human head and even tens hole doughnuts, but its hollow rate is still not high, in 30%.
Composite spinning is a kind of new method that produces along with the development of water-soluble polyester, and it is the polymer melt spinning simultaneously of adopting different solubility properties, and the back that is shaped is dissolved and gone a wherein component, makes fiber have axial cavity.Liu Xin etc. (" high degree of hollowness PP doughnut manufacturing technology "; Beijing Institute of Clothing Tech's journal, the 24th the 4th phase of volume of December in 2004,17-21 page or leaf) a kind of technology of preparing of high degree of hollowness PP doughnut disclosed; It is cortex that this method prepares on composite spinning machine with PP; With the special modified copolyester of Copolyester is the core-sheath compound fibre of sandwich layer, removes back formation hollow hole after sandwich layer is dissolved in alkali treatment, and degree of hollowness is 30～50%.But this method when dissolve removing sandwich layer through alkali treatment, " because special modified copolyester is in the sandwich layer of composite fibre, and aqueous slkali is to infiltrate from the two ends of staple fibre during basic hydrolysis; dissolve and remove relatively difficulty "; The condition of basic hydrolysis is more violent, and when the aqueous slkali mass concentration is 10g/L, temperature is 100 ℃; When hydrolysis time was 60min, sandwich layer could dissolve fully and remove.Long when hydrolysis time, cause the unnecessary waste of the energy, and alkaline concentration is too high, very big to the pollution of environment, need waste water be handled, cause fiber cost to promote greatly.Because PP and the special modified copolyester of Copolyester do not possess compatibility, also can't promote hydrolysis efficiency through changing the fibrous physics structure.In addition, prepared PP doughnut though possess light weight, is protected advantages such as dim property is good, its dyeability extreme difference, and taking is not high.
The present invention adopts the skin-core structure polyester staple fiber of composite spinning method spinning, considers the excellent compatibility of polyester and water-soluble polyester, introduces water-soluble polyester simultaneously at cortex; When the water-soluble polyester that removes sandwich layer is dissolved in alkali treatment; Aqueous slkali can infiltrate from the surface and the two ends of staple fibre simultaneously, significantly improves hydrolysis efficiency, and hydrolysis time shortens greatly; Solved the energy waste that above-mentioned polypropylene hollow fiber causes owing to hydrolysis time is long; Required hydrolysising condition reduces, and when alkaline concentration is very low, can water-soluble polyester all be dissolved, and has reduced fiber cost to a great extent.In addition, with the water-soluble polyester of cortex dissolve remove after, form a large amount of micropores, groove and through hole on the surface of fiber, give fiber significant moisture absorbing and sweat releasing effect, keep the dry and comfortable comfortable of skin.Utilize this method to produce the core-skin type doughnut; When having avoided irregularly-shaped hole spinnerets spin processes spinning doughnut in the crimp of the hollow hole that stretches, curls, causes in the spinning process; And, make the controlled hollow polyester staple fiber of degree of hollowness through changing the material rate of spinning.
Summary of the invention
The present invention aims to provide the preparation method of the controlled many micropores hollow polyester staple fiber of a kind of degree of hollowness.
Technical scheme of the present invention reaches in the following manner:
With the polyester of (41～90) % and the water-soluble polyester input cortex screw extruder of (3～24) %, the water-soluble polyester input sandwich layer screw extruder of (5～45) % is wherein formed the polyester of cortex and the ratio of water-soluble polyester and is (75～95): (5～25); Carry out the composite molten spinning; Measuring pump measures back input spinning manifold (290 ℃ of spinning manifolds) respectively, and after the composite spinning spinnerets was extruded, the blowing cooling oiled; Reel behind the integrated tow (speed 1400m/min), behind the boundling through the two-stage drawing-off; One-level drawing-off (88 ℃ of drawing temperatures, 3.5 times of drafting multiples), secondary drawing-off (100 ℃ of drawing temperatures, 1.1 times of drafting multiples), relaxation heat setting (125 ℃ of temperature; 60min), cut off the back packing and make staple fibre.
After the fiber that utilizes above-mentioned technology to obtain is processed fabric, be 0.5～5g/L through over-richness, temperature is 100 ℃ the amount 10～30min of aqueous slkali place, and the water-soluble polyester of cortex and sandwich layer all decomposes, and can form many microporous hollow fibers fabric.
Many micropores of the prepared hollow of the present invention polyester staple fiber has remarkable moisture absorbing and sweat releasing effect and protects dim effect; Its beneficial effect is embodied in: the skin-core structure that 1) fiber had; When having avoided profile spinneret method spinning doughnut because the crimp of the hollow hole that stretches, curls, caused in the spinning process; And through changing the material rate of spinning, the degree of hollowness of fiber can reach 5～75%; 2) introduce water-soluble polyester simultaneously at cortex, when the water-soluble polyester that removes sandwich layer was dissolved in alkali treatment, aqueous slkali can infiltrate from the surface and the two ends of staple fibre simultaneously; Significantly improve hydrolysis efficiency; Hydrolysis time shortens greatly, has solved the energy waste that above-mentioned polypropylene hollow fiber causes owing to hydrolysis time is long, and required hydrolysising condition reduces; When alkaline concentration is very low, can water-soluble polyester all be dissolved, reduce fiber cost to a great extent; 3) introducing of cortex water-soluble polyester forms a large amount of micropores, groove and through hole at fiber surface, and moisture, sweat etc. is derived rapidly through the wicking passage, gives fiber significant moisture absorbing and sweat releasing effect.
Specific embodiments
To help to understand the present invention through following examples, but not limit the scope of the invention.Should be understood that those skilled in the art belong to protection scope of the present invention equally to the various equivalent modifications that the present invention did after the content of having read the present invention's instruction.
Embodiment 1
Polyester with 30% and 5% water-soluble polyester input cortex screw extruder, 65% water-soluble polyester input sandwich layer screw extruder, wherein forming the polyester of cortex and the ratio of water-soluble polyester is 75: 25; Carry out the composite molten spinning; Measuring pump measures back input spinning manifold (290 ℃ of spinning manifolds) respectively, and after the composite spinning spinnerets was extruded, the blowing cooling oiled; Reel behind the integrated tow (speed 1400m/min), behind the boundling through the two-stage drawing-off; One-level drawing-off (88 ℃ of drawing temperatures, 3.5 times of drafting multiples), secondary drawing-off (100 ℃ of drawing temperatures, 1.1 times of drafting multiples), relaxation heat setting (125 ℃ of temperature; 60min), cut off the back packing and make staple fibre.After the fiber that utilizes above-mentioned technology to obtain is processed fabric, be 2g/L through over-richness, temperature is 100 ℃ the amount 30min of aqueous slkali place, and the water-soluble polyester of cortex and sandwich layer all decomposes, and forming degree of hollowness 75% is many microporous hollow fibers fabric.
Embodiment 2
Polyester with 75% and 5% water-soluble polyester input cortex screw extruder, 20% water-soluble polyester input sandwich layer screw extruder, wherein forming the polyester of cortex and the ratio of water-soluble polyester is 94: 6; Carry out the composite molten spinning; Measuring pump measures back input spinning manifold (290 ℃ of spinning manifolds) respectively, and after the composite spinning spinnerets was extruded, the blowing cooling oiled; Reel behind the integrated tow (speed 1400m/min), behind the boundling through the two-stage drawing-off; One-level drawing-off (88 ℃ of drawing temperatures, 3.5 times of drafting multiples), secondary drawing-off (100 ℃ of drawing temperatures, 1.1 times of drafting multiples), relaxation heat setting (125 ℃ of temperature; 60min), cut off the back packing and make staple fibre.After the fiber that utilizes above-mentioned technology to obtain is processed fabric, be 2g/L through over-richness, temperature is 100 ℃ the amount 10min of aqueous slkali place, and the water-soluble polyester of cortex and sandwich layer all decomposes, and forming degree of hollowness 25% is many microporous hollow fibers fabric.
Claims (3)
1. the present invention relates to the preparation method of the controlled hollow polyester staple fiber of a kind of degree of hollowness; It is characterized in that: use two screw extruders to give core-skin spinneret component feed respectively; Cortex is polyester and water-soluble polyester; Sandwich layer is a water-soluble polyester, by a certain percentage melt composite spinning, reel, stretch oneself and yawn, curl, relaxation heat setting, cut-out make core-skin composite fiber.The fabric that utilizes this fiber to process is handled through aqueous slkali, removes the water-soluble polyester component of sandwich layer and cortex, can make fiber form hollow structure, forms a large amount of micropores, ditch mortise and through hole at surfaces externally and internally simultaneously.
2. the preparation method of the hollow polyester staple fiber that degree of hollowness as claimed in claim 1 is controlled is characterized in that: fiber is a skin-core structure, and the component of cortex is polyester and water-soluble polyester, and the component of sandwich layer is a water-soluble polyester.The polyester of cortex and the weight ratio of water-soluble polyester are (75～95): (5～25), the weight ratio of cortex and sandwich layer are (35～95): (5～65).Adopting the degree of hollowness of the obtained doughnut of regulation and control material rate method is 5～75%.
3. the preparation method of the hollow polyester staple fiber that degree of hollowness as claimed in claim 1 is controlled is characterized in that: used polyester includes but are not limited to a kind of among CDPET, PBT, the PTT.Used water-soluble polyester is for including but are not limited to COPET, and COPET adopts the direct esterification method to make by terephthalic acid (TPA), ethylene glycol, M-phthalic acid and DMIP-5-sodium sulfonate.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103436989A (en) * | 2013-07-25 | 2013-12-11 | 安徽东锦化纤科技有限公司 | Sea-island fiber and preparation method thereof |
| CN103938323A (en) * | 2014-04-04 | 2014-07-23 | 余燕平 | Method for preparing non-PVA fiber hollow yarn and hollow fabric thereof |
| CN104451920A (en) * | 2013-09-22 | 2015-03-25 | 东丽纤维研究所（中国）有限公司 | Polyester fiber, fabric with polyester fiber and manufacturing method |
| CN104726948A (en) * | 2015-04-21 | 2015-06-24 | 井孝安 | Novel hollow composite fiber |
| CN106136387A (en) * | 2015-04-23 | 2016-11-23 | 东丽纤维研究所（中国）有限公司 | A kind of multilamellar fabric |
| CN106757514A (en) * | 2016-12-07 | 2017-05-31 | 太仓荣文合成纤维有限公司 | A kind of preparation method of hollow PBT fibers |
| CN107740196A (en) * | 2017-10-12 | 2018-02-27 | 南京科技职业学院 | A kind of preparation method based on micro-fluidic doughnut |
| CN111394814A (en) * | 2020-04-23 | 2020-07-10 | 罗莱生活科技股份有限公司 | Skin-care composite fiber and preparation method and application thereof |
| CN114214743A (en) * | 2021-12-17 | 2022-03-22 | 江苏江南高纤股份有限公司 | Preparation method of ultralow denier composite short fiber |
| CN114214742A (en) * | 2021-12-17 | 2022-03-22 | 江苏江南高纤股份有限公司 | Preparation method of HDPE-PET multi-time hydrophilic composite short fiber |
| CN114214740A (en) * | 2021-12-17 | 2022-03-22 | 江苏江南高纤股份有限公司 | Preparation method of composite short fiber with high flexibility and low fuzzing performance |
| CN114775106A (en) * | 2022-05-30 | 2022-07-22 | 江苏江南高纤股份有限公司 | Preparation method of low-melting-point composite polyester fiber with porous structure |
| CN115012125A (en) * | 2022-07-29 | 2022-09-06 | 韩忠 | Moisture-absorbing and quick-drying polyester fabric and preparation method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436989A (en) * | 2013-07-25 | 2013-12-11 | 安徽东锦化纤科技有限公司 | Sea-island fiber and preparation method thereof |
| CN103436989B (en) * | 2013-07-25 | 2016-03-02 | 安徽东锦资源再生科技有限公司 | A kind of islands-in-sea type fibre and preparation method thereof |
| CN104451920A (en) * | 2013-09-22 | 2015-03-25 | 东丽纤维研究所（中国）有限公司 | Polyester fiber, fabric with polyester fiber and manufacturing method |
| CN103938323A (en) * | 2014-04-04 | 2014-07-23 | 余燕平 | Method for preparing non-PVA fiber hollow yarn and hollow fabric thereof |
| CN104726948A (en) * | 2015-04-21 | 2015-06-24 | 井孝安 | Novel hollow composite fiber |
| CN106136387A (en) * | 2015-04-23 | 2016-11-23 | 东丽纤维研究所（中国）有限公司 | A kind of multilamellar fabric |
| CN106757514A (en) * | 2016-12-07 | 2017-05-31 | 太仓荣文合成纤维有限公司 | A kind of preparation method of hollow PBT fibers |
| CN107740196A (en) * | 2017-10-12 | 2018-02-27 | 南京科技职业学院 | A kind of preparation method based on micro-fluidic doughnut |
| CN111394814A (en) * | 2020-04-23 | 2020-07-10 | 罗莱生活科技股份有限公司 | Skin-care composite fiber and preparation method and application thereof |
| CN114214743A (en) * | 2021-12-17 | 2022-03-22 | 江苏江南高纤股份有限公司 | Preparation method of ultralow denier composite short fiber |
| CN114214742A (en) * | 2021-12-17 | 2022-03-22 | 江苏江南高纤股份有限公司 | Preparation method of HDPE-PET multi-time hydrophilic composite short fiber |
| CN114214740A (en) * | 2021-12-17 | 2022-03-22 | 江苏江南高纤股份有限公司 | Preparation method of composite short fiber with high flexibility and low fuzzing performance |
| CN114214742B (en) * | 2021-12-17 | 2023-08-25 | 江苏江南高纤股份有限公司 | Preparation method of HDPE-PET multiple hydrophilic composite short fiber |
| CN114775106A (en) * | 2022-05-30 | 2022-07-22 | 江苏江南高纤股份有限公司 | Preparation method of low-melting-point composite polyester fiber with porous structure |
| CN114775106B (en) * | 2022-05-30 | 2024-01-30 | 江苏江南高纤股份有限公司 | Preparation method of porous-structure low-melting-point composite polyester fiber |
| CN115012125A (en) * | 2022-07-29 | 2022-09-06 | 韩忠 | Moisture-absorbing and quick-drying polyester fabric and preparation method thereof |
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Application publication date: 20120516 |