CN109161973A - The production technology of acid fiber by polylactic - Google Patents
The production technology of acid fiber by polylactic Download PDFInfo
- Publication number
- CN109161973A CN109161973A CN201811107468.5A CN201811107468A CN109161973A CN 109161973 A CN109161973 A CN 109161973A CN 201811107468 A CN201811107468 A CN 201811107468A CN 109161973 A CN109161973 A CN 109161973A
- Authority
- CN
- China
- Prior art keywords
- polylactic
- spinning
- wind
- dry
- acid fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/02—Spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
Abstract
The invention belongs to technical field of textile equipment more particularly to a kind of production technologies of acid fiber by polylactic.The invention discloses the production technologies of the acid fiber by polylactic of the physical indexs such as the breaking strength of PLA fiber, elongation at break, and its technical solution is as follows: the production technology of acid fiber by polylactic, which is characterized in that the preparation method is as follows: A: slices synthesis method, pre-crystallized, dry；B: screw extruder melting, using filament spinning component spinneret；C: side-blown air cooling: use side-blown wind process for 23 DEG C of wind-warm syndrome, rheumatism 85%, wind speed 0.38m/s；D: spin finishing frame, drafting forming: use 1050m/min spinning speed E: winding is examined.The beneficial effects of the present invention are: slice moisture content can be reduced and to prevent slice from degrading in the drying process excessive, its apparent viscosity is reduced by reinforcing shear rate.
Description
Technical field
The invention belongs to technical field of textile equipment more particularly to a kind of production technologies of acid fiber by polylactic.
Background technique
At present in the production technology of acid fiber by polylactic, unreasonable due to technique, polymer is in hot and humid environment
Hydrolysis can occur by ester linkage breaking and generate degradation, cause molecular weight to decline to a great extent, to seriously affect the product of finished fiber
Matter, therefore the degradation of the moisture content and slice of strict control PLA polymer is wanted before spinning.The thermal sensitivity and height of long filament grade PLA
Viscous characteristic, causes the contradiction between PLA polymer thermal sensitivity and melt high viscosity.
Summary of the invention
It is an object of the invention to solve the problems, such as techniques discussed above, provide one kind can reduce slice moisture content and
It prevents slice from degrading in the drying process excessive, reduces its apparent viscosity by reinforcing shear rate, solve PLA polymer heat
Contradiction between quick property and melt high viscosity improves the spinnability of PLA, improves the intensity and pull resistance of PLA fiber, improves PLA
The production technology of the acid fiber by polylactic of the physical indexs such as breaking strength, the elongation at break of fiber, its technical solution is as follows:
The production technology of acid fiber by polylactic, which is characterized in that the preparation method is as follows:
A: slices synthesis method, it is pre-crystallized, dry:, drying process dry using multistage subsection formula vacuum drum, the first order: dry temperature
Degree is 60 DEG C, and drying time is 4 hours, the second level: drying temperature is 80 DEG C, and drying time is 4 hours, the third level: dry temperature
Degree is 100 DEG C, and drying time is 16 hours, it is ensured that slice moisture control is in 30ppm or less；
B: screw extruder melting, using filament spinning component spinneret: spinning spinneret plate aperture 0.22mm, draw ratio 3.2, spinning group
Part sand is mixed, and is layered assembling using the metal sand of different meshes；
C: side-blown air cooling: use side-blown wind process for 23 DEG C of wind-warm syndrome, rheumatism 85%, wind speed 0.38m/s；
D: drafting forming: spin finishing frame uses 1050m/min spinning speed
E: winding is examined.
Major technique innovative point is first is that polylactic acid slice is dry using multistage subsection formula vacuum drum；Second is that increasing spinneret orifice
Draw ratio；Third is that improving the physical index of PLA fiber using secondary drawing is carried out under 1050m/min spinning speed.
1, hydrolysis can occur by ester linkage breaking in hot and humid environment due to polymer and generates degradation, cause molecule
Amount declines to a great extent, to seriously affect the quality of finished fiber, therefore wanted before spinning the moisture content of strict control PLA polymer with
And the degradation of slice.PLA is sliced dry using multistage subsection formula vacuum drum in actual production, is reduced slice moisture content and is prevented
Only be sliced degrade in the drying process it is excessive.Multistage subsection formula drying process: 60 DEG C of 4hr → 80 DEG C 4hr → 100 DEG C 16hr is cut
The moisture control of piece is in 30 ppm or less.
2, for the thermal sensitivity of long filament grade PLA and high viscous characteristic, using higher than PET same specification spinning spinneret plate hole major diameter
Than (3.2), shear thinning flow phenomenon is had according to PLA slice, its apparent viscosity is reduced by reinforcing shear rate, solves
Contradiction between PLA polymer thermal sensitivity and melt high viscosity improves the spinnability of PLA.
3, it is used due to being easily degraded under polylactic acid high temperature, in production under 1050m/min spinning speed and carries out secondary drawing,
It increase accordingly the connection chain between chip, to improve the intensity and pull resistance of PLA fiber, the fracture for improving PLA fiber is strong
The physical indexs such as degree, elongation at break.
The beneficial effects of the present invention are: slice moisture content can be reduced and prevent slice from degrading in the drying process
Greatly, its apparent viscosity is reduced by reinforcing shear rate, solves the lance between PLA polymer thermal sensitivity and melt high viscosity
Shield improves the spinnability of PLA, improves the intensity and pull resistance of PLA fiber, improves breaking strength, the elongation at break of PLA fiber
Etc. physical indexs.
Specific embodiment
Embodiment is specifically described below:
The production technology of acid fiber by polylactic, which is characterized in that the preparation method is as follows:
A: slices synthesis method, it is pre-crystallized, dry:, drying process dry using multistage subsection formula vacuum drum, the first order: dry temperature
Degree is 60 DEG C, and drying time is 4 hours, the second level: drying temperature is 80 DEG C, and drying time is 4 hours, the third level: dry temperature
Degree is 100 DEG C, and drying time is 16 hours, it is ensured that slice moisture control is in 30ppm or less；
B: screw extruder melting, using filament spinning component spinneret: spinning spinneret plate aperture 0.22mm, draw ratio 3.2, spinning group
Part sand is mixed, and is layered assembling using the metal sand of different meshes；
C: side-blown air cooling: use side-blown wind process for 23 DEG C of wind-warm syndrome, rheumatism 85%, wind speed 0.38m/s；
D: drafting forming: spin finishing frame uses 1050m/min spinning speed
E: winding is examined.
1. chip drying
It is dry using multistage subsection formula vacuum drum by Comparability test, 60 DEG C of 4hr → 80 DEG C of drying process 4hr → 100 DEG C
16hr, it is ensured that slice moisture control in 30ppm hereinafter, improve PLA fiber spinnability, reduce spinning process in lousiness and
Broken end.
2. filament spinning component technique
According to the characteristic of long filament grade PLA, using PET same specification spinning spinneret plate hole draw ratio is higher than, be conducive to reinforce shearing
Rate improves the spinnability of PLA.PLA spinning spinneret plate aperture 0.22mm, draw ratio 3.2.Component sand is mixed, using difference
The metal sand of mesh number is layered assembling, and initial pressure is reduced in the identical situation of spinnability, improves stability of spinning process.
3. cross air blasting condition
Use side-blown wind process for 23 DEG C of wind-warm syndrome, rheumatism 85%, wind speed 0.38m/s, it is ensured that production stability.
4. spinning technique
Since the thermal stability of PLA polymer is poor, to avoid larger amount of thermal polymer degradation, guaranteeing that melt rheological property is good
In the case where, using lower spinning temperature, each area's temperature control of screw rod is at 205 ~ 212 DEG C, and biphenyl heats gas phase temperature control
System is at 211 DEG C；Simultaneously under the premise of guaranteeing that pressure and fiber uniformly squeeze out, Screw Extrusion pressure is reduced to 8.0Mpa, to subtract
Few reflux of the melt in screw rod reduces the degree of thermal degradation, reduces intensity to reduce melt in the residence time of high-temperature region
The decline of index, so as to improve production run situation and the physical property of fiber.
It oils: according to spinning specification, improving the position that oils of tow, strand is avoided to generate shake, shadow due to air speed influence
Ring product irregularity.
Product the key technical indexes:
1, line density deviation ratio (%): ± 2.5；2, breaking strength (CN/dtex): >=3.5；3, breaking strength irregularity (%):
≤10.0；4, elongation at break (%): 28 ± 6；5, elongation at break irregularity (%) :≤10.0；6, boiling water shrinkage (%):
9±1.0；7, color uniformity (gray card): >=4 grades；8, oil content (%): 0.8 ± 0.1.
Product system enterprise self-determining exploitation.Acid fiber by polylactic is a kind of renewable and biological with green, environmental protection, raw material
The new bio base fiber of the good characteristics such as degradation.Acid fiber by polylactic superior performance has fabulous drapability, slipping, moisture absorption
Gas permeability, natural bacteriostatic and the faintly acid for enabling skin trust, good heat resistance and anti-ultraviolet function and rich in gloss and bullet
Property.The product has following core technology: 1, polylactic acid slice is dry using multistage subsection formula vacuum drum；2, due to polylactic acid
It is easily degraded under high temperature and low temperature flow problem, using secondary drawing is carried out under 1050m/min spinning speed, improves PLA
The physical index of fiber；3, technological parameter: (1) multistage subsection formula drying process: 40 DEG C of 2hr → 60 DEG C vacuum condition under is used
4hr→80℃10hr→92℃20hr；(2) spinning technique: 198 DEG C of spinning temperature, component pressure 16.5MPa, spinning speed
1050m/min, total draw ratio D/R=3.2 of second level, draft temperature T1/T2/T3=74 DEG C/78 DEG C/80 DEG C.Including PLA fiber
The clothes such as clothing, gym suit, easy dress series and home textile, toy, health care etc. have significant exploitation advantages, market
It has a extensive future.
Claims (1)
1. the production technology of acid fiber by polylactic, which is characterized in that the preparation method is as follows:
A: slices synthesis method, it is pre-crystallized, dry:, drying process dry using multistage subsection formula vacuum drum, the first order: dry temperature
Degree is 60 DEG C, and drying time is 4 hours, the second level: drying temperature is 80 DEG C, and drying time is 4 hours, the third level: dry temperature
Degree is 100 DEG C, and drying time is 16 hours, it is ensured that slice moisture control is in 30ppm or less；
B: screw extruder melting, using filament spinning component spinneret: spinning spinneret plate aperture 0.22mm, draw ratio 3.2, spinning group
Part sand is mixed, and is layered assembling using the metal sand of different meshes；
C: side-blown air cooling: use side-blown wind process for 23 DEG C of wind-warm syndrome, rheumatism 85%, wind speed 0.38m/s；
D: drafting forming: spin finishing frame uses 1050m/min spinning speed；
E: winding is examined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107468.5A CN109161973A (en) | 2018-09-21 | 2018-09-21 | The production technology of acid fiber by polylactic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107468.5A CN109161973A (en) | 2018-09-21 | 2018-09-21 | The production technology of acid fiber by polylactic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109161973A true CN109161973A (en) | 2019-01-08 |
Family
ID=64880227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811107468.5A Pending CN109161973A (en) | 2018-09-21 | 2018-09-21 | The production technology of acid fiber by polylactic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109161973A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629306A (en) * | 2019-08-14 | 2019-12-31 | 安徽桑尼旅游休闲用品有限公司 | Preparation method of degradable polylactic acid fiber |
| CN113026129A (en) * | 2021-03-23 | 2021-06-25 | 苏州盟红新材料科技有限公司 | Heat setting method of high-heat-resistance polylactic acid fiber |
| CN114592253A (en) * | 2022-02-11 | 2022-06-07 | 安徽丰原生物纤维股份有限公司 | Polylactic acid filament and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362853A (en) * | 2008-09-12 | 2009-02-11 | 浙江海正生物材料股份有限公司 | Low cost full-biodegradable polylactic acid sheet material and preparation method thereof |
| CN106893275A (en) * | 2015-12-18 | 2017-06-27 | 四川鑫达企业集团有限公司 | A kind of degradable recovery poly-lactic acid material and preparation method thereof |
-
2018
- 2018-09-21 CN CN201811107468.5A patent/CN109161973A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362853A (en) * | 2008-09-12 | 2009-02-11 | 浙江海正生物材料股份有限公司 | Low cost full-biodegradable polylactic acid sheet material and preparation method thereof |
| CN106893275A (en) * | 2015-12-18 | 2017-06-27 | 四川鑫达企业集团有限公司 | A kind of degradable recovery poly-lactic acid material and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 刘淑强等: "纺长丝用聚乳酸切片的干燥工艺", 《纺织学报》 * |
| 吴改红，刘淑强: "《聚乳酸纤维及其纺织品》", 31 May 2014, 东华大学出版社 * |
| 李琪等: "可生物降解聚乳酸长丝的中低速熔融纺丝工艺研究", 《山东纺织科技》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629306A (en) * | 2019-08-14 | 2019-12-31 | 安徽桑尼旅游休闲用品有限公司 | Preparation method of degradable polylactic acid fiber |
| CN113026129A (en) * | 2021-03-23 | 2021-06-25 | 苏州盟红新材料科技有限公司 | Heat setting method of high-heat-resistance polylactic acid fiber |
| CN114592253A (en) * | 2022-02-11 | 2022-06-07 | 安徽丰原生物纤维股份有限公司 | Polylactic acid filament and preparation method thereof |
| CN114592253B (en) * | 2022-02-11 | 2024-02-23 | 安徽丰原生物纤维股份有限公司 | Polylactic acid filament yarn and preparation method thereof |
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Application publication date: 20190108 |