CN101086089A - Method for direct preparation of fiber product from polylactic acid polymerized melt - Google Patents
Method for direct preparation of fiber product from polylactic acid polymerized melt Download PDFInfo
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- CN101086089A CN101086089A CNA2007101116611A CN200710111661A CN101086089A CN 101086089 A CN101086089 A CN 101086089A CN A2007101116611 A CNA2007101116611 A CN A2007101116611A CN 200710111661 A CN200710111661 A CN 200710111661A CN 101086089 A CN101086089 A CN 101086089A
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- polylactic acid
- acid polymerized
- melt
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- fiber
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- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 88
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 88
- 239000000835 fiber Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title description 8
- 238000009987 spinning Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 50
- 238000007599 discharging Methods 0.000 claims description 36
- 241001062472 Stokellia anisodon Species 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000155 melt Substances 0.000 claims description 8
- 239000004745 nonwoven fabric Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 15
- 239000004744 fabric Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract 7
- 238000003466 welding Methods 0.000 abstract 7
- 238000006116 polymerization reaction Methods 0.000 abstract 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000002861 polymer material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 8
- 238000005266 casting Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000000379 polymerizing effect Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 description 4
- 238000005453 pelletization Methods 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 241000381602 Vachellia nebrownii Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000012760 heat stabilizer Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 210000003097 mucus Anatomy 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 2
- 208000032765 Device extrusion Diseases 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Polyesters Or Polycarbonates (AREA)
Abstract
A directive preparing method of fiber products through polylactic acid polymeric welding flux belongs to high polymer materials application technology. It heats the polylactic acid polymeric welding flux which is prepared through the polymerization reaction in the polylactic acid polymerization reaction device by means of a welding flux conveyer which is connected between the discharge port of termination device discharge pump of polylactic acid polymerization reaction device and the feeding inlet of spinning runk, and guides the polylactic acid polymeric welding flux into spinning runk in positive pressure and thermal insulation state, then the spinning runk spins the guided polylactic acid polymeric welding flux and prepares fabric products. The advantages are: it avoids the impact of spinning performance caused by dry, it ensures spinning performance and also ensures the quality of fiber products; the polylactic acid polymeric welding flux is guided into spinning runk to spin from discharge pump and through welding flux conveyer, so the technology process is very simple and easy, the equipment investment is less; due to no granulating, dewatering, drying, screw bolt squeezing and melting, energy consumption can be saved more than one third, it is useful for reducing the cost of fiber products.
Description
Technical field
The present invention relates to a kind of method of direct preparation of fiber product from polylactic acid polymerized melt, belong to macromolecule new material applied technical field.
Background technology
PLA is as initial feed with renewable corn or glucose etc., through the degradable macromolecule new material that the multiple tracks preparation flow finally is polymerized, the U.S. is formal suitability for industrialized production in 2002, and academic name is abbreviated as PLA, China is in development, does not enter suitability for industrialized production as yet.
At present, the indivedual manufacturers of China are attempting preparing fibre with the resulting polylactic acid polymerized melt of polymerizing reactor polymerisation, its method is: at first, to be that lactide (LA) and initator devote poly lactic acid polymerized reaction unit ring-opening polymerization and add micro-end-capping reagent in the termination device when reaction finishes by main material, heat stabilizer and acid-capture agent, the polylactic acid polymerized melt (mucus shape) that obtains after the reaction termination by continue the discharging pump of the termination device of poly lactic acid polymerized reaction unit send into or termination device at polymerizing reactor in nitrogen injection melt is pressed into the casting head, or the twin-screw that adopts the band exhaust becomes the termination device melt clamp-oned the casting head, flows out into the tape shape through a casting orifice plate and enters in the water continuously and cool off; Enter pelleter then continuously, after water cooling, become the solid band, be cut into the PLA particle of certain specification size, be commonly called as " section " by pelleter; This polylactic acid slice enters centrifugal dehydrator continuously then; Section after processed is transported to carries out drying in the drying device; Drying enters screw extruder after handling, under certain temperature and extrusion pressure, polylactic acid melt after the fusion becomes the mucus shape to enter in the spinning manifold continuously, under the pressure effect of Spinning pumps, in spinning pack, spray the formation fibre continuously in the spinnerets aperture by the amount of setting, the fibre that forms enters down one stretching and winding (long filament) after air cooling, finish are handled continuously or (short fiber) cut off in the boundling stretching or air is drawn into net hot rolling (spun-bonded non-woven fabrics), obtains the fibrous material of different cultivars.
The step that said method comprised is specifically by shown in Figure 1, comes from the polylactic acid polymerized melt of poly lactic acid polymerized reaction unit, through discharging pump output, the casting of casting device, water-cooling apparatus water cooling, pellet device blank, centrifugal dehumidifier dehydration, drying device drying, screw rod melt extruded device extrusion molten, manifold spinning, fibre.Said method obviously is the spinning process category that belongs to traditional, and process procedure is many, in above-mentioned processing step, is that the most difficult grasp is controlled to the drying of cutting into slices especially.Because PLA has the low characteristic of vitrification point (about 60 ℃), so its drying is very difficult, the baking temperature height, section produces bonding, and baking temperature is low, does not then moisturely reach requirement.Because in the PLA spinning process, the moisture higher meeting of cutting into slices causes the material degraded, influence spinnability, reduce mechanical strength, so section must be under high vacuum state, adopt low temperature (about 60 ℃) long-time dry or dry for a long time, with the moisture index of guaranteeing to cut into slices with low temperature (about 60 ℃) nitrogen.As seen, the quality of drying effect not only can influence spinnability, and for drying, often needs to consume a large amount of energy, and production cost is increased, and other step such as pelletizing, dehydration, screw rod extrusion molten will consume equally gets a large amount of energy.
Up to now, industry thinks that all the time in the preparation process from the polylactic acid polymerized melt to the fibre, the arbitrary link in the above-mentioned process procedure is absolutely necessary, thereby does not have shortcut to walk.Be confined to the constraint of this traditional thinking just, thereby restricted the process of industrialization for preparing fibre with polylactic acid polymerized melt.
Summary of the invention
Task of the present invention is that a kind of method that can reduce process procedure effectively, save the direct preparation of fiber product from polylactic acid polymerized melt of use equipment, energy savings will be provided.
Task of the present invention is finished like this, a kind of polylactic acid polymerized melt directly prepares the method for fiber, be characterised in that: it is by means of a melt Conveying device that continues between the charging aperture of the discharging opening of the discharging pump of the termination device of poly lactic acid polymerized reaction unit and manifold polylactic acid polymerized melt to be under heating and the keeping warm mode with malleation introducing manifold the resulting polylactic acid polymerized melt in poly lactic acid polymerized reaction unit polymerisation termination back, by manifold the polylactic acid melt of being introduced is carried out spinning, obtain fibre.
In one embodiment of the invention, air line distance between the discharging opening of the discharging pump of described termination device and the charging aperture of manifold is＜200m, described discharging pump is the pressurized melt delivery pump, and described termination device is the polylactic acid polymerized melt after-treatment device.
In another embodiment of the present invention, the temperature of described heating and insulation is the technological temperature of the resulting muciform polymer in poly lactic acid polymerized reaction unit polymerisation termination back, and described polylactic acid polymerized melt is in muciform polylactic acid polymerized melt for the discharging opening from the device that terminates all the time in the process of discharging pump introducing manifold casing.
In another embodiment of the present invention, the pressure of described malleation is＞0.5MPa.
In yet another embodiment of the present invention, describedly be introduced as continuous introducing, described spinning is a continuous spinning, and the quantity of described manifold is one or more.
In another embodiment of the present invention, described fibre is any one in PLA long filament, PLA short fiber, the PLA filament non-woven fabric.
In of the present invention and then embodiment, described technological temperature is 170-250 ℃.
More of the present invention and among embodiment, described melt Conveying device comprise a whole process be set in the spacer air line distance＜200m's and the smelt spout that connects with the charging aperture of the discharging opening of discharging pump and manifold respectively of two ends; Being used on spacer of continuing heats and uses the heater of the polylactic acid polymerized melt heating of being flowed in the tube chamber that makes smelt spout the spacer chamber of described spacer.
In again of the present invention and then embodiment, described heater comprises being connected with described spacer and introducing the medium inlet tube of heat-conducting medium and the medium fairlead and that is used for that the heat-conducting medium in the spacer chamber is drawn that is connected with spacer and communicate with the spacer chamber with spacer chamber being used for of communicating in the spacer chamber and is connected on heat-conducting oil furnace on the loop of described medium introducing, fairlead.
Of the present invention again more and among embodiment, described heater comprises the electrical heating elements on the outer wall of the described spacer that is laid in and places the heat-conducting medium in spacer chamber and be connected the high-order expansion slot that communicates with the spacer chamber on the spacer.
Of the present invention also more and among embodiment, described heater is the electrical heating cover that is coated on the outer wall of smelt spout.
One of advantage of the technical scheme that the present invention recommended, because polylactic acid polymerized melt does not need through water cooling pelletizing step, thereby do not contain water, so do not need to its drying, thereby avoided causing influence to spinnability because of drying factor, both spinnability can be ensured, the quality of fibre can be guaranteed again; Two, directly polylactic acid polymerized melt is introduced the manifold spinning by discharging pump through the melt Conveying device, saved in the prior art numerous and complicatedly such as casting, water cooling, pelletizing, dehydration, drying, screw rod extrusion molten step, so technical process is very simple and convenient, the equipment less investment; Three owing to do not have pelletizing, dehydration, drying, a screw rod extrusion molten, but therefore energy efficient is of value to the cost that reduces fibre more than 1/3rd.
Description of drawings
Fig. 1 lift for the present invention and prior art in polylactic acid polymerized melt prepare the process chart of fibre.
Fig. 2 is an embodiment schematic diagram of the described melt Conveying device of the inventive method.
Fig. 3 is another embodiment schematic diagram of the described melt Conveying device of the inventive method.
Fig. 4 is an embodiment schematic diagram again of the described melt Conveying device of the inventive method.
Fig. 5 is the another embodiment schematic diagram of the described melt Conveying device of the inventive method.
The specific embodiment
For the auditor that the makes Patent Office especially public can further understand essence of the present invention and beneficial effect, the applicant is described in detail as follows in the specific embodiment mode, but can not look embodiment for constituting the restriction to the inventive method.
Embodiment 1
See also Fig. 2, with main material lactide (LA) and micro-initator through such as by Chinese patent CN1884337A, the poly lactic acid polymerized reaction unit ring-opening polymerization of the disclosed preparation PLA of CN1884338A also adds micro-end-capping reagent in the termination device when reaction finishes, heat stabilizer and acid-capture agent, the resulting technological temperature in reaction termination back is a polylactic acid polymerized melt by the air line distance between the charging aperture that continues in the discharging opening of the discharging pump 2 of termination device 1 and manifold 8 at 235 ℃ muciform polymer is that the melt Conveying device of 180m heats polylactic acid polymerized melt and is incubated under 235 ℃ of states with the pressure of＞2MPa and introduces manifold 8 continuously, carry out continuous spinning by 8 pairs of polylactic acid melts of introducing continuously of manifold, obtain fibre 9.For discharging pump 2, preferred but be not limited to as using gear delivery pump by the production and sales of the dynamo-electric manufactory in million rivers, Chinese Tianjin.
In the present embodiment, the melt Conveying device of recommending comprise a whole process be set in the spacer 5 straight line apart from for 180m's and the smelt spout 4 that connects with the charging aperture of the discharging opening of discharging pump 2 and manifold 8 respectively of two ends and being used on spacer 5 of continuing the spacer chamber 12 of spacer 5 heated use the heater that the polylactic acid polymerized melt that flowed in the tube chamber that makes smelt spout 4 heats.This heater comprise with an end by medium introduce interface 3 be connected on the spacer 5 and communicate with spacer chamber 12 be used for to spacer chamber 12 in for example medium inlet tube 6 of conduction oil of introducing heat-conducting medium, the other end of medium inlet tube 6 is connected on the heat-conducting oil furnace 7; One end is drawn interface 11 by medium and is connected on the spacer 5 and medium fairlead 10 that being used for of communicating with spacer chamber 12 drawn the heat-conducting mediums in the spacer chamber 12, the other end of medium fairlead 10 is connected on the heat-conducting oil furnace 7, makes heat-conducting medium form the loop that circulates in spacer chamber 12 by the heat-conducting oil furnace 7 on the loop that is connected on medium introducing, fairlead 6,10.For heat-conducting oil furnace 7, preferred but what be not limited to is the SW-T-40 heat-conducting oil furnace as adopting the model of being produced and sold by the three-dimensional electric heater in Zhenjiang, Zhengjiang City, Jiangsu Province, China Co., Ltd.
Be that 235 ℃ polylactic acid polymerized melt is when smelt spout 4 is sent into manifold 8 spinning by the discharging pump 2 on the termination device 1 that continues at poly lactic acid polymerized reaction unit with temperature, introducing interface 3 by medium inlet tube 6 through medium is incorporated in the spacer chamber 12 of spacer 5, nationality remains under 235 ℃ of states the polylactic acid polymerized melt that flows in the smelt spout 4 by the conduction oil as heating agent and enters manifold 8 with good flowability, and the conduction oil in the spacer chamber 12 is drawn interface 11 by medium and is caused heat-conducting oil furnace 7 for 10 times through the medium fairlead, formation heats continuously to the circulation in spacer chamber 12, meanwhile, to carry out spinning from the polylactic acid polymerized melt that smelt spout 4 is introduced by manifold 8, specifically: under the high pressure of discharging pump 2 promotes, polylactic acid polymerized melt is entered in the manifold 8 that the fiber production industry is habitually practised in the prior art, the temperature of manifold is controlled at about 235 ℃, because the pressure of smelt spout 4 falls bigger, when melt arrived spinning manifold, melt pressure was controlled at about 2MPa in its casing porch pipeline.Measuring pump in placing manifold 8 is sent into spinning pack, flows out through the spinnerets aperture to be the melt thread, after the air cooling, obtains fibre 9, i.e. polylactic acid fibre.
Just flowing out spinnerets fully in the cooling under the air-flow effect at certain pressure to being acid fiber by polylactic by the resulting fiber of present embodiment, fiber is stretched vertically downward, and be adsorbed on equably on the convoying curtain, enter hot-rolling with certain width and thickness, behind hot rolling reeling, become the filament non-woven fabric that certain thickness and width are arranged or enter spun-laced machine water thorn, after high pressure fine flowing water thorn drying and shaping, become the filament non-woven fabric that certain thickness and width are arranged, be used for medical and hygiene article and other civilian commodity.
In the present embodiment, because the discharging opening from discharging pump 2 is bigger to the distance of the straight line between the charging aperture of manifold 8,180 meters have promptly been reached, therefore smelt spout 4 adopts multi-section type to connect, and each joint smelt spout 4 one of each tool is used for interface 3,11 is introduced, drawn to the medium that heating agent is introduced, drawn; And to spacer 5 and media that each joint smelt spout 4 is outer introduce, the surface of fairlead 6,10 coats first, second insulation material 13,14 respectively.In addition, when manifold 8 is that two or two are when above, smelt spout 4 is being played the part of house steward's role so, receives out or claim to distribute the branched pipe that being used for more than two or two is connected with the charging aperture of the manifold 8 of respective numbers in smelt spout 4 exits.In the present embodiment, mentioned termination device 1 can also comprise the melt after-treatment device.
See also Fig. 3.Is that 210 ℃ polylactic acid polymerized melt is directly sent into manifold 8 through straight line apart from the smelt spout 4 that is 20 meters from continuing at the discharging pump 2 of termination on the device 1 with the resulting temperature in polymerizing reactor polymerisation termination back, the temperature of manifold is controlled at about 210 ℃, conduction oil temperature in the spacer 5 is identical with the polylactic acid polymerized melt temperature, to spin by manifold 8 fibre be that polylactic acid fibre is after postchannel process oils, caused the drawing-off hot-rolling after 3～6 times of drawing-offs by the feeding roller continuously, being batched continuously on the bobbin of reel system becomes the FDY long filament or is treated as the BCF long filament through air-texturing, can be directly used in weaving face fabric, the fibre of carpet.In the present embodiment, since shorter from the discharging opening of discharging pump 2 to the air line distance between the charging aperture of manifold 8, only be 20 meters, and when melt arrived spinning manifold, melt pressure was controlled at about 5MPa in its casing porch smelt spout 4.Therefore smelt spout 4 need not to adopt multi-section type to connect.All the other are with the description to embodiment 1.
Embodiment 3
See also Fig. 4.Is that 220 ℃ polylactic acid polymerized melt is directly sent into manifold 8 through straight line apart from the smelt spout 4 that is 100 meters by continuing at the discharging pump 2 of termination on the device 1 with the resulting temperature in polymerizing reactor polymerisation termination back, the temperature of spinning manifold is controlled at about 220 ℃, spacer 5 outer walls are twining the electric heating silk ribbon 15 as electrical heating elements of enough power, coated by first insulation material 13 in electric heating silk ribbon 15 appearances, falling heat-transfer oil 19 in spacer chamber 12, the Volume Changes that when conduction oil heats up, produces owing to thermal expansion, make the conduction oil 19 of expansion enter high-order expansion slot 18 by pipeline 17 by the overfall 16 that communicates with spacer chamber 12, the temperature of the conduction oil 19 in the spacer 5 is controlled at 220 ℃, when melt arrives spinning manifold 8, melt pressure is controlled at about 3MPa in its casing porch melt pipe, to resulting fibre 9 be polylactic acid fibre under the effect of the godet roller of postchannel process with the collection of filaments, then through the multiple roll drawing-off, curl, HEAT SETTING, cut off, open hair, become staple fibre.This staple fibre is used for weaving face fabric after spinning, also can be directly used in textile product stuffing or short fiber nonwoven production, and all the other are all with the description to embodiment 1.
See also Fig. 5.By the discharging pump 2 that continues on termination device 1 the resulting 185 ℃ polylactic acid polymerized melt in polymerizing reactor polymerisation termination back is directly sent into spinning manifold 8 through straight line apart from the smelt spout 4 that is 5 meters, spinning body temperature is controlled at about 185 ℃, be coated with 20 pairs of smelt spout of Electrothermal ring, 4 heating of overlapping on the outer wall of smelt spout 4 and be controlled at 185 ℃, coated by first insulation material 13 in Electrothermal ring 20 appearances as electrical heating.When melt arrives spinning manifold 8, melt pressure in its casing porch melt pipe is controlled at about 8MPa, to resulting fibre 9 is that polylactic acid fibre is reeled on the bobbin of reel system after postchannel process oils continuously, winding speed becomes the POY filament fiber more than 2500 meters/minute; Winding speed becomes the UDY filament fiber below 1000 meters/minute, and this fiber obtains being directly used in the fibrous finished product of weaving face fabric after adding bullet or drawing-off and handling.
By the foregoing description 1～4 as can be known, to the resulting fibre 9 of the present invention the handling according to needing that be polylactic acid fibre through road later, can obtain the fibre of various degradable harmless environment, especially utilize the inventive method to prepare the energy that fibre consumes and only be 1/3rd of conventional method, has ultimate attainment energy-saving significance, whole process of preparation is brief, can satisfy the industrialized mass production requirement.In addition, the foregoing description smelt spout 4 in one's power can be turned round, but total length should be controlled at as much as possible≤the 200m scope in because the polylactic acid polymerized melt thermal degradation in the long smelt spout 4 that can increase in the spacer 5 of span, the output pressure to discharging pump 2 requires higher simultaneously.The inventive method that the applicant recommended has obtained the confirmation of producing in batches, thereby has industrial applicibility.
Claims (11)
1, a kind of polylactic acid polymerized melt directly prepares the method for fiber, it is characterized in that it is by means of a melt Conveying device that continues between the charging aperture of the discharging opening of the discharging pump of the termination device of poly lactic acid polymerized reaction unit and manifold polylactic acid polymerized melt to be under heating and the keeping warm mode with malleation introducing manifold the resulting polylactic acid polymerized melt in poly lactic acid polymerized reaction unit polymerisation termination back, by manifold the polylactic acid melt of being introduced is carried out spinning, obtain fibre.
2, polylactic acid polymerized melt according to claim 1 directly prepares the method for fiber, it is characterized in that the air line distance between the charging aperture of the discharging opening of described discharging pump and manifold is＜200m, described discharging pump is the pressurized melt delivery pump, and described termination device is the polylactic acid polymerized melt after-treatment device.
3, polylactic acid polymerized melt according to claim 1 directly prepares the method for fiber, the temperature that it is characterized in that described heating and insulation is the technological temperature of the resulting muciform polymer in poly lactic acid polymerized reaction unit polymerisation termination back, and described polylactic acid polymerized melt is in muciform polylactic acid polymerized melt for the discharging opening from the device that terminates all the time in the process of discharging pump introducing manifold casing.
4, polylactic acid polymerized melt according to claim 1 directly prepares the method for fiber, it is characterized in that the pressure of described malleation is＞0.5MPa.
5, polylactic acid polymerized melt according to claim 1 directly prepares the method for fiber, it is characterized in that the described continuous introducing that is introduced as, and described spinning is a continuous spinning, and the quantity of described manifold is one or more.
6, polylactic acid polymerized melt according to claim 1 directly prepares the method for fiber, it is characterized in that described fibre is any one in PLA long filament, PLA short fiber, the PLA filament non-woven fabric.
7, polylactic acid polymerized melt according to claim 3 directly prepares the method for fiber, it is characterized in that described technological temperature is 170-250 ℃.
8, polylactic acid polymerized melt according to claim 1 directly prepares the method for fiber, it is characterized in that described melt Conveying device comprise a whole process be set in the spacer air line distance＜200m's and the smelt spout that connects with the charging aperture of the discharging opening of discharging pump and manifold respectively of two ends; Being used on spacer of continuing heats and uses the heater of the polylactic acid polymerized melt heating of being flowed in the tube chamber that makes smelt spout the spacer chamber of described spacer.
9, polylactic acid polymerized melt according to claim 8 directly prepares the method for fiber, it is characterized in that described heater comprises being connected with described spacer and introducing the medium inlet tube of heat-conducting medium and the medium fairlead and that is used for that the heat-conducting medium in the spacer chamber is drawn that is connected with spacer and communicate with the spacer chamber with spacer chamber being used for of communicating in the spacer chamber to be connected on heat-conducting oil furnace on the loop of described medium introducing, fairlead.
10, polylactic acid polymerized melt according to claim 8 directly prepares the method for fiber, it is characterized in that described heater comprises the electrical heating elements on the outer wall of the described spacer that is laid in and places the heat-conducting medium in spacer chamber and be connected the high-order expansion slot that communicates with the spacer chamber on the spacer.
11, polylactic acid polymerized melt according to claim 8 directly prepares the method for fiber, it is characterized in that described heater is included as the electrical heating cover on the outer wall that is coated on smelt spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101116611A CN100526525C (en) | 2006-07-25 | 2007-06-07 | Method for direct preparation of fiber product from polylactic acid polymerized melt |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610041211 CN1900389A (en) | 2006-07-25 | 2006-07-25 | Method for directly preparing fiber product fron poly lactic acid polymerized smelting body |
| CN200610041211.5 | 2006-07-25 | ||
| CNB2007101116611A CN100526525C (en) | 2006-07-25 | 2007-06-07 | Method for direct preparation of fiber product from polylactic acid polymerized melt |
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| CN101086089A true CN101086089A (en) | 2007-12-12 |
| CN100526525C CN100526525C (en) | 2009-08-12 |
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| CNB2007101116611A Active CN100526525C (en) | 2006-07-25 | 2007-06-07 | Method for direct preparation of fiber product from polylactic acid polymerized melt |
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| CN102189615A (en) * | 2010-03-03 | 2011-09-21 | 奇美实业股份有限公司 | Lactic acid polymer ball-shaped grains and manufacturing method thereof |
| CN102587042A (en) * | 2012-03-06 | 2012-07-18 | 天津工业大学 | One-step polylactic acid spun-laid spunlace non-woven fabric and manufacturing method of non-woven fabric |
| CN104066879A (en) * | 2012-01-11 | 2014-09-24 | 东洋纺株式会社 | Non-woven fabric for use in disposable body warmer |
| CN105671793A (en) * | 2016-03-23 | 2016-06-15 | 江苏豪悦实业有限公司 | Method for preparing polylactic-acid biodegradable non-woven fabrics for surface coating layers of sanitary accessories |
| CN106350884A (en) * | 2016-08-29 | 2017-01-25 | 王辉 | Preparation method of polylactic acid short fiber |
| CN110552075A (en) * | 2019-08-21 | 2019-12-10 | 福建三宏再生资源科技有限公司 | Spinning production line adopting heat conduction oil and use method thereof |
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