CN105734701B - Polylactic acid slice adds titanium dioxide delustring spinning production technology - Google Patents
Polylactic acid slice adds titanium dioxide delustring spinning production technology Download PDFInfo
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- CN105734701B CN105734701B CN201610233618.1A CN201610233618A CN105734701B CN 105734701 B CN105734701 B CN 105734701B CN 201610233618 A CN201610233618 A CN 201610233618A CN 105734701 B CN105734701 B CN 105734701B
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- 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
- D01D13/00—Complete machines for producing artificial threads
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- 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
- D01D1/06—Feeding liquid to the spinning head
- D01D1/065—Addition and mixing of substances to the spinning solution or to the melt; Homogenising
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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
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Abstract
Polylactic acid slice adds titanium dioxide delustring spinning production technology, comprises the following steps:（1）, catalyst, stabilizer, lactide be added in agitator tank；（2）, lactide mixture after the pre- hot mixing of polylactic acid pre-polymerization mixing device to carrying out preliminary polymerization in first poly- tank；（3）, finally polymerize in poly- tank eventually；（4）, produce polylactic acid slice（5）, drop into spinning screw extruder after titanium dioxide dry powder and polylactic acid slice mixing, and sound integrated pipeline formula mixing device mixes；（6）, filament spinning component polylactic acid melt is spun into delustring or semi-dull acid fiber by polylactic.Present invention ensure that melt flows downward under constant speed state, and make melt temperature in prepolymerization pipe also basically identical, the present invention directly sets some groups of batch mixing units on the 3rd conveying pipeline, eliminate and mixing system is installed on conveyance conduit, cost is saved, reach the purpose of uniform batch mixing, conveying and batch mixing efficiency greatly improve.
Description
Technical field
The invention belongs to poly lactic acid polymerized technical field, more particularly to a kind of addition titanium dioxide delustring of polylactic acid slice to spin
Silk production technology.
Background technology
Poly lactic acid polymerized process includes pre-polymerization and gathers eventually.The melt for needing to polymerize is first had to by pre-polymerization, the equipment of pre-polymerization
It is the tank body of a vertical type cylinder shape, prepolymerization pipe is vertically equipped with the top of tank body.Need prepolymerized melt from
The upper end of prepolymerization pipe quantitatively enters in prepolymerization pipe, by self gravitation and steadily flows down to from the top down in tank body.By
In the friction factor of melt and prepolymerization tube wall, the melt of prepolymerization tube hub flow downward speed than prepolymerization tube wall at
The downward flowing velocity of melt it is fast, and the temperature at prepolymerization tube wall and the temperature of prepolymerization tube hub also have difference
Not.And preferably situation is；1st, melt flows downward under constant speed state；2nd, it is every when melt flows downward in prepolymerization pipe
The tube wall of a aspect and the solution temperature of prepolymerization tube hub be desirably also；3rd, due to being used to convey polylactic acid after eventually gathering
Conveyance conduit it is longer, close to tube wall high polymer molten viscosity it is especially big, polylactic acid melt is in course of conveying because of melt
Molecular weight of high polymer wider distribution caused by flow velocity is uneven（It is uneven）Problem, impurity cannot effectively filter out, so that shadow
Sound arrives spinning quality.To reach this purpose, need to assemble array batch mixing preheater in prepolymerization pipe, to meet wanting for polymerization technique
Ask.
The content of the invention
The present invention is in order to solve shortcoming of the prior art, there is provided it is a kind of can be by prepolymerization inside pipe wall and center
Melt keeps basic constant speed to flow downward and prepolymerization inside pipe wall can be swapped to mix with the melt at center and keeps temperature
Unanimously, the polylactic acid slice being uniformly mixed in poly- rear course of conveying eventually adds titanium dioxide delustring spinning production technology.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：Polylactic acid slice adds titanium dioxide delustring
Spinning production technology, the production equipment that the production technology uses include aggregation framework, pelleter, cooling bay, vulcanization it is crystallizing bed,
Drying tower, the first feed bin, the second feed bin, compressed air system, spinning screw extruder and spinning manifold, from upper in aggregation framework
Agitator tank, first poly- tank are equipped with and successively and poly- tank, stirring pot bottom are connected by the first conveying pipeline with first poly- tank top eventually, the
One conveying pipeline is equipped with polylactic acid pre-polymerization mixing device, the first autocontrol valve and the first metering pump, and first poly- pot bottom passes through the
Two conveying pipelines are connected with poly- tank top eventually, and the second conveying pipeline is equipped with the second autocontrol valve and the second metering pump, eventually poly- tank bottom
Portion is connected with the 3rd conveying pipeline, and the 3rd conveying pipeline is equipped with the 3rd metering pump, and the discharge port of the 3rd conveying pipeline is connected with positioned at cold
But the polylactic acid melt above pond extrudes orifice plate, and cooling water is loaded with cooling bay, and the working end of pelleter is located in cooling bay,
It is outer and be connected by the conveyer feed end crystallizing bed with vulcanization that the discharge end of pelleter is located at cooling bay, vulcanizes crystallizing bed to go out
Expect that the feed inlet of end and drying tower connects, the discharge port of drying tower is connected with the feed inlet of the second feed bin；
The discharge port of second feed bin is connected by main tremie pipe with the feed inlet of spinning screw extruder, compressed air system
Air outlet and main tremie pipe between be provided tiltedly with air hose, air hose and the position of compressed air system connecting pin are higher than air hose and master
The position of tremie pipe connecting pin, air hose are equipped with the adjusting air valve of neighbouring compressed air system, and the discharge port of the first feed bin passes through
Mix tube is connected with air hose, and mix tube is equipped with powder meter, and the discharge port of spinning screw extruder passes through melt pipe
Road is connected with spinning manifold, and melt pipe is equipped with sound integrated pipeline formula mixing device, and spinning measuring is equipped with spinning manifold
Pump and filament spinning component, the discharge port of melt pipe extend into spinning manifold and are connected with the feed inlet of spinning pump, spinning
The outlet of metering pump and the import of filament spinning component connect；
The production technology includes step in detail below：
（1）, will participate in polymerization catalyst and stabilizer in fully fusion become suspension, suspension is injected into stirring
In tank, while lactide melt is injected into agitator tank, open agitator tank work, 20~40min of stirring melt is equal until mixing
Stop stirring after even；
（2）, open stirring pot bottom the first autocontrol valve, lactide melt mixture is passed through by the first metering pump
First conveying pipeline, which drops into, just carries out preliminary polymerization operation in poly- tank, under the action of lactide melt mixture self gravitation,
Lactide melt mixture by polylactic acid pre-polymerization mixing device during enter after pre- hot mixing in first poly- tank, first
It is that temperature is 100~150 DEG C that preliminary polymerization operation is carried out in poly- tank, and the time of preliminary polymerization operation is 1~2h, and pressure is
0.2MPa, after preliminary polymerization operation, lactide, titanium dioxide, the mixture of catalyst and stabilizer are aggregated into be sticky
Polylactic acid melt；
（3）, open just poly- pot bottom the second autocontrol valve, it is by the second metering pump that polylactic acid melt is defeated through second
Expects pipe drops into the final polymerization operation of the interior progress of poly- tank eventually, and final polymerization operation is that temperature is 150~280 DEG C, and finally polymerization is made
The time of industry is 1~6h, pressure 0.3MPa；
（4）, open the 3rd autocontrol valve of poly- pot bottom eventually, the polylactic acid melt in poly- tank is arranged through the 3rd conveying pipeline eventually
Go out, the 3rd metering pump set on the 3rd conveying pipeline provides the power of metering, filtering and conveying for polylactic acid melt, clean, mixed
Close uniform polylactic acid melt and band strip is extruded as by polylactic acid melt extrusion orifice plate, water then is carried out to polylactic acid melt
It is cold；
（5）, polylactic acid melt water cooling be solidified to operation pelleter after room temperature and carry out section operation, pelleter is by with strip
Polylactic acid melt is cut into polylactic acid slice, by conveyer by polylactic acid slice be transported to vulcanization it is crystallizing bed on crystallized, tie
Polylactic acid slice is transported to drying tower and is dried after crystalline substance；
（6）, dried polylactic acid dry chip is stored into the second feed bin, dry titanium dioxide dry powder storage is arrived
In first feed bin, the second bin bottom is connected by main tremie pipe with the feed inlet of spinning screw extruder；
（7）, the titanium dioxide dry powder in the first feed bin dropped into by gravity in powder meter, powder meter is to dioxy
Change titanium dry powder to be measured；While polylactic acid dry chip in the second feed bin falls by gravity in main tremie pipe, compression
Air system is blown into dry compressed air into air hose, and the titanium dioxide dry powder measured by powder meter is blown into master
In tremie pipe, wind speed size can be adjusted in adjusting air valve, not year-on-year with polylactic acid dry chip to adapt to titanium dioxide dry powder
The mixing of example, titanium dioxide dry powder are dropped into after being mixed in main tremie pipe with polylactic acid dry chip in spinning screw extruder；
（8）, titanium dioxide dry powder and polylactic acid dry chip is heated to 200-300 DEG C and poly- breast is made by spinning screw extruder
Sour melt；
（9）, spinning screw extruder discharge pressure effect under, the polylactic acid melt after filtering passes through melt pipe quilt
It is sent in spinning manifold, further uniformly mixing polylactic acid melts the sound integrated pipeline formula mixing device installed on melt pipe
Body；
（10）, the spinning pump in spinning manifold will enter filament spinning component, spinning after polylactic acid melt metering supercharging
Polylactic acid melt is spun into delustring or semi-dull acid fiber by polylactic by component.
Polylactic acid pre-polymerization mixing device includes the prepolymerization pipe that is arranged in vertical, in prepolymerization pipe from top to bottom at least
Equipped with two batch mixing preheaters, all equal structures of batch mixing preheater are identical；
Each batch mixing preheater includes the first upper conical guide shell, the second upper conical water conservancy diversion with same center line
Cylinder, the first inferior pyramidal guide shell, the second inferior pyramidal guide shell, upper shunting cone cylinder and lower shunting cone cylinder；
First upper conical guide shell and the first inferior pyramidal guide shell are upper coarse and lower fine and upper and lower permeable structures, the first epicone
Shape guide shell bottom diameter is more than the second upper conical guide shell bottom diameter, the second upper conical guide shell and the second inferior pyramidal water conservancy diversion
Cylinder is up-thin-low-thick and upper and lower permeable structures, in the first upper conical guide shell bottom diameter and the second upper conical guide shell upper end
Footpath is equal, and the first inferior pyramidal guide shell bottom diameter is equal with the second inferior pyramidal guide shell upper-end inner diameter, the first upper conical water conservancy diversion
Cylinder upper end outer, the second upper conical guide shell lower end outer, the first inferior pyramidal guide shell upper end edge and the second inferior pyramidal water conservancy diversion
Cylinder lower end edge is fixedly connected with prepolymerization inside pipe wall, the first upper conical guide shell lower end edge and the second upper conical guide shell
Upper end edge is fixedly connected, and the first upper conical guide shell lower end edge is fixedly connected with the second upper conical guide shell upper end edge,
First inferior pyramidal guide shell lower end edge is fixedly connected with the second inferior pyramidal guide shell upper end edge；
Upper shunting cone cylinder sharply blocks for top, the structure of bottom opening, and lower shunting cone cylinder sharply blocks for bottom, top
Open structure, upper shunting cone cylinder bottom diameter are equal to lower shunting cone cylinder upper-end inner diameter, and upper shunting cone cylinder bottom diameter is less than pre-
It polymerize bore, upper shunting cone cylinder lower end edge is fixedly connected with lower shunting cone cylinder upper end edge；Upper shunting cone cylinder and lower shunting
Cone cylinder outer wall is fixedly connected by heating agent conduit with prepolymerization inside pipe wall；
The upper end of upper shunting cone cylinder be higher than the first upper conical guide shell upper end edge, under the lower lower end and second for shunting cone cylinder
Conical flow guiding cylinder upper end edge flushes；
Circulation road under formation tube wall melt between upper shunting cone cylinder outer surface and the second upper conical guide shell outer surface, lower point
Circulation road under blend melt is formed between flow cone cylinder outer surface and the first inferior pyramidal guide shell outer surface；
Upper shunting cone cylinder outer surface is equipped with central melt flow dividing structure, lower end and the tube wall melt of central melt flow dividing structure
Lower circulation road lower end crosses.
Sound integrated pipeline formula mixing device includes fixed -piping and batch mixing unit, and batch mixing unit includes coaxial setting
Static batch mixing pipeline and dynamic mixture pipeline, the right end flanged joint of the left end of dynamic mixture pipeline and static batch mixing pipeline, are moved
It is equipped with dynamic screw partition plate in state batch mixing pipeline, axially inside direction is separated into the to dynamic screw partition plate by dynamic mixture pipeline
One semicircle helical duct and the second semicircle helical duct, dynamic screw partition plate and dynamic mixture inner-walls of duct clearance fit；It is static
Static ribbon partition plate is equipped with batch mixing pipeline, static batch mixing pipeline is axially inside separated into the 3rd in direction by static ribbon partition plate
Semicircle helical duct and the 4th semicircle helical duct, static ribbon partition plate are fixedly connected with static batch mixing inner-walls of duct；
Plane where the both ends of dynamic screw partition plate and static ribbon partition plate is each perpendicular in dynamic mixture pipeline
Mandrel line, dynamic screw partition plate right part center are equipped with dynamic cone tank, and dynamic screw partition plate left part center is equipped with dynamic and pushes up
Point, static ribbon partition plate right part center are equipped with static cone tank, and static ribbon partition plate left part center is top equipped with static state, moves
The top left end of state is withstood in static cone tank；
Fixed -piping left end and dynamic mixture pipeline right end flanged joint, fixed -piping is interior to be equipped with stent, and stent is equipped with
Stationary center, stationary center left end are withstood in dynamic cone tank.
The quantity of batch mixing unit is more than or equal to two groups, flanged joint between two adjacent groups batch mixing unit, one group of batch mixing unit
Static top left end withstand in the dynamic cone tank of one group of adjacent batch mixing unit, one group of batch mixing of fixed -piping and low order end
Unit connects.
The length of static batch mixing pipeline is less than the length of dynamic mixture pipeline.
Central melt flow dividing structure includes shunt cylinder and several isocons, and shunt cylinder and isocon are each provided at point
On flow cone cylinder, shunt cylinder open top, shunt cylinder upper end edge is horizontal, and isocon is wide at the top and narrow at the bottom, and all isocons are along upper shunting
Cone cylinder circumferencial direction is evenly arranged, and isocon upper end is connected with shunt cylinder lower end, and shunting infratubal port is located at tube wall melt and flows down
Passage lower end and the outside of circulation road upper end intersection under blend melt.
Upper shunting cone cylinder is internally formed preheating cavity, the first inferior pyramidal guide shell and the second inferior pyramidal with lower shunting cone cylinder
Hot circulating fluid medium has been passed through in preheating cavity under being internally formed of guide shell, upper preheating cavity and lower preheating cavity；Heating agent conduit
Inner to be connected with upper preheating cavity, heating agent external catheter end is stretched out outside prepolymerization pipe.
The step（2）Middle lactide melt mixture carries out the specific of pre- hot mixing by polylactic acid pre-polymerization mixing device
Process is：Lactide melt mixture flows downward in prepolymerization pipe；The third friendship that setting flows downward along prepolymerization tube hub
Ester melt blend is melt A, and the lactide melt mixture to flow downward along prepolymerization tube wall is melt B；Melt A is along upper
Shunting cone surface enters shunt cylinder, and melt A flows under tube wall melt circulation road lower end with mixing automatically by isocon again
The outside of the intersection of circulation road upper end under melt, at the same time, the melt B close to prepolymerization tube wall are upper conical by first
Guide shell enters under tube wall melt the top in circulation road, flowing under tube wall melt and being located at melt A behind circulation road lower end, i.e., molten
Body A and melt B enter under blend melt after circulation road, and melt A is located at lower floor, and melt B is located at upper strata, when melt A and melt B
When flowing to circulation road lower end outlet under blend melt, melt B is located among melt A, i.e. melt A is transformed into along tube wall by center
Continuing to flow downward, melt B continues to flow downward by being transformed into center close to tube wall, during transposition, melt A and melt B
Also a certain proportion of mixing has been carried out.
The step（9）The detailed process that middle sound integrated pipeline formula mixing device mixes polylactic acid melt is：
Under the discharge pressure effect of spinning screw extruder, the polylactic acid melt after polymerization is entered by fixed -piping, when sticky melts
Body under high pressure by dynamic mixture pipeline when, dynamic screw partition plate starts to rotate under the promotion of melt, dynamic mixture
Viscous melt on the inner wall of pipeline is scraped by rotating dynamic screw partition plate, in the viscous melt scraped and dynamic mixture pipeline
Between diluter melt mix, and push ahead to the 3rd semicircle helical duct and the 4th semicircle in static batch mixing pipeline
Mixed in helical duct, entered back into after mixing and above-mentioned mixing process is repeated in dynamic mixture pipeline.
Using above-mentioned technical proposal, during melt mixed transposition, heat is passed through in upper preheating cavity and lower preheating cavity
Circulation of fluid medium, hot circulating fluid medium can add thermal medium such as according to technological requirement；Biphenyl Ether, conduction oil etc., it is right
Melt is preheated, to facilitate control prepolymerization process.The present invention takes no dead angle design in the junction of all parts.One
Multigroup batch mixing preheater can be installed from top to bottom in root prepolymerization pipe.
Sound integrated pipeline formula mixing device is set on melt pipe, is had the advantages that：Due to the first semicircle
Helical duct and the second semicircle helical duct it is longer and in the axial direction for the hand of spiral set, thus can be in high-voltage fuse
Body by when, driving dynamic screw partition plate rotation；The top shape coordinated with cone tank top pressure of rotary material of dynamic screw partition plate
Formula, is not only easy to manufacture and assembles, and the frictional force smaller in rotary course, so as to improve the effect of dynamic screw partition plate scraper
Rate.The length of static batch mixing pipeline is less than the length of dynamic mixture pipeline, can so make the big of the whole pipeline for conveying polylactic acid
Partial-length can all wipe the king-sized polylactic acid of the viscosity adhered on tube wall off, fully improve the uniformity of mixing.
Production technology using the present invention, the present invention first produce polylactic acid slice, further according to the fiber properties present invention poly-
Certain proportion is added in lactic acid sliced materials（0.2%~3%）Fiber grade titanium dioxide（TiO2）, the feel of fiber has substantially
Improvement, it is larger to have light（Not plus TiO2）The obvious soft many of acid fiber by polylactic.Secondly, dyeing kinetics substantially reduce, and contaminate
Color uniformity is improved.
In conclusion principle of the invention science, design are reasonable, simple in structure, it is ensured that the melt in prepolymerization pipe is constant
Flow downward under speed state, and make the tube wall of each aspect and prepolymerization tube hub when melt flows downward in prepolymerization pipe
Solution temperature is also basically identical, so as to meet the requirement of polymerization technique.Some groups of batch mixing units are directly set on melt pipe
, eliminate and mixing system be installed on conveyance conduit, saved cost, reach the purpose of uniform batch mixing, conveying and batch mixing
Efficiency greatly improves.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of the invention for having in Fig. 1 one group of batch mixing unit；
Fig. 3 is the dimensional structure diagram of dynamic screw partition plate in Fig. 2；
Fig. 4 is the dimensional structure diagram of static ribbon partition plate in Fig. 2；
Fig. 5 is the structure diagram of polylactic acid pre-polymerization mixing device in Fig. 1；
Fig. 6 is the top view of the central melt flow dividing structure in Fig. 5.
Embodiment
As shown in figs 1 to 6, polylactic acid slice of the invention addition titanium dioxide delustring spinning production equipment, including polymerization
Frame 16, pelleter 17, cooling bay 18, vulcanization are crystallizing bed 60, drying tower 61, the first feed bin 62, the second feed bin 63, compressed air
System 64, spinning screw extruder 65 and spinning manifold 66, agitator tank 19, just poly- is equipped with aggregation framework 16 successively from top to bottom
Tank 20 and eventually poly- tank 21,19 bottom of agitator tank is connected by the first conveying pipeline 22 with the just poly- top of tank 20, on the first conveying pipeline 22
Equipped with polylactic acid pre-polymerization mixing device 40, the first autocontrol valve 23 and the first metering pump 24, first poly- 20 bottom of tank passes through second
Conveying pipeline 25 is connected with the poly- top of tank 21 eventually, and the second conveying pipeline 25 is equipped with the second autocontrol valve 26 and the second metering pump 27,
Poly- 21 bottom of tank is connected with the 3rd conveying pipeline 28 eventually, and the 3rd conveying pipeline 28 is equipped with the 3rd metering pump 29, the 3rd conveying pipeline 28
Discharge port is connected with the polylactic acid melt extrusion orifice plate 32 above cooling bay 18, is loaded with cooling water in cooling bay 18, cuts
The working end of grain machine 17 is located in cooling bay 18, and the discharge end of pelleter 17 is located at outside cooling bay 18 and by conveyer and vulcanization
Crystallizing bed 60 feed end connection, the discharge end of vulcanization crystallizing bed 60 are connected with the feed inlet of drying tower 61, and drying tower 61 goes out
Material mouth is connected with the feed inlet of the second feed bin 63.
The discharge port of second feed bin 63 is connected by main tremie pipe 67 with the feed inlet of spinning screw extruder 65, and compression is empty
Air hose 68, air hose 68 and 64 connecting pin of compressed air system are provided tiltedly between the air outlet of gas system 64 and main tremie pipe 67
Higher than air hose 68 and the position of main 67 connecting pin of tremie pipe, air hose 68 is equipped with the adjusting wind of neighbouring compressed air system 64 for position
Valve 69, the discharge port of the first feed bin 62 are connected by mix tube 70 with air hose 68, and mix tube 70 is equipped with powder meter
71, the discharge port of spinning screw extruder 65 is connected by melt pipe 72 with spinning manifold 66, and melt pipe 72 is equipped with dynamic
Quiet integrated pipeline formula mixing device 31, spinning manifold 66 is interior to be equipped with spinning pump 73 and filament spinning component 74, melt pipe 72
Discharge port extend into spinning manifold 66 and is connected with the feed inlet of spinning pump 73, the outlet and spinning of spinning pump 73
The import connection of component 74.
Sound integrated pipeline formula mixing device 31 includes fixed -piping 1 and batch mixing unit, and batch mixing unit includes coaxial set
Static the batch mixing pipeline 2 and dynamic mixture pipeline 3 put, the right end flange of the left end of dynamic mixture pipeline 3 and static batch mixing pipeline 2
Connection, is equipped with dynamic screw partition plate 4 in dynamic mixture pipeline 3, dynamic screw partition plate 4 by dynamic mixture pipeline 3 axially inside
Direction is separated into the first semicircle helical duct 5 and the second semicircle helical duct 6, dynamic screw partition plate 4 with dynamic mixture pipeline 3
Wall clearance fit；Static ribbon partition plate 7 is equipped with static batch mixing pipeline 2, static ribbon partition plate 7 is by inside static batch mixing pipeline 2
In axial direction it is separated into the 3rd semicircle helical duct 8 and the 4th semicircle helical duct 9, static ribbon partition plate 7 and static batch mixing
2 inner wall of pipeline is fixedly connected.
Plane where the both ends of dynamic screw partition plate 4 and static ribbon partition plate 7 is each perpendicular to dynamic mixture pipeline 3
Central axis, 4 right part center of dynamic screw partition plate are equipped with dynamic cone tank 10, and 4 left part center of dynamic screw partition plate is equipped with
Dynamically top 11,7 right part center of static ribbon partition plate is equipped with static cone tank 12, and 7 left part center of static ribbon partition plate is set
There is static state top 13, top 11 left end of dynamic is withstood in static cone tank 12.
1 left end of fixed -piping and 3 right end flanged joint of dynamic mixture pipeline, fixed -piping 1 is interior to be equipped with stent 14, stent 14
Stationary center 15 is equipped with, 15 left end of stationary center is withstood in dynamic cone tank 10.
The quantity of batch mixing unit is more than or equal to two groups, flanged joint between two adjacent groups batch mixing unit, one group of batch mixing unit
Static top 13 left end withstand in the dynamic cone tank 10 of one group of adjacent batch mixing unit, the one of fixed -piping 1 and low order end
The unit connection of group batch mixing.The length of static batch mixing pipeline 2 is less than the length of dynamic mixture pipeline 4.
Polylactic acid pre-polymerization mixing device 40 includes the prepolymerization pipe 41 being arranged in vertical, and 41 both ends of prepolymerization pipe are fixed
Be connected on the first conveying pipeline 22, or can using the first conveying pipeline 22 as prepolymerization pipe 41, in prepolymerization pipe 41 from upper and
Under it is identical at least provided with two batch mixing preheaters, all equal structures of batch mixing preheater；Prepolymerization pipe 41 can make in the present invention
Replaced with the first conveying pipeline 22；
Each batch mixing preheater includes having the first upper conical guide shell 42, second of same center line is upper conical to lead
Flow cartridge 43, the first inferior pyramidal guide shell 44, the second inferior pyramidal guide shell 45, upper shunting cone cylinder 46 and lower shunting cone cylinder 47；
First upper conical 42 and first inferior pyramidal guide shell 44 of guide shell is upper coarse and lower fine and upper and lower permeable structures, and first
Upper conical 42 bottom diameter of guide shell is more than the second upper conical 43 bottom diameter of guide shell, the second upper conical guide shell 43 and second
Inferior pyramidal guide shell 45 is up-thin-low-thick and upper and lower permeable structures, the first upper conical 42 bottom diameter of guide shell and the second epicone
43 upper-end inner diameter of shape guide shell is equal, 45 upper-end inner diameter of 44 bottom diameter of the first inferior pyramidal guide shell and the second inferior pyramidal guide shell
It is equal, the first upper conical 42 upper end outer of guide shell, the second upper conical 43 lower end outer of guide shell, the first inferior pyramidal guide shell 44
Upper end edge and 45 lower end edge of the second inferior pyramidal guide shell are fixedly connected with 41 inner wall of prepolymerization pipe, the first upper conical water conservancy diversion
Cylinder 42 lower end edges be fixedly connected with the second upper conical 43 upper end edge of guide shell, the first upper conical 42 lower end edge of guide shell and
Second upper conical 43 upper end edge of guide shell is fixedly connected, 44 lower end edge of the first inferior pyramidal guide shell and the second inferior pyramidal water conservancy diversion
45 upper end edges of cylinder are fixedly connected；
Upper shunting cone cylinder 46 is sharply blocked for top, the structure of bottom opening, lower shunting cone cylinder 47 be bottom sharply block,
The structure of open top, 46 bottom diameter of upper shunting cone cylinder are equal to lower shunting 47 upper-end inner diameter of cone cylinder, 46 lower end of upper shunting cone cylinder
Internal diameter is less than 41 internal diameter of prepolymerization pipe, and upper shunting 46 lower end edge of cone cylinder is fixedly connected with 47 upper end edge of lower shunting cone cylinder；On
Shunting cone cylinder 46 and lower shunting 47 outer wall of cone cylinder are fixedly connected by heating agent conduit with 41 inner wall of prepolymerization pipe；
The upper end of upper shunting cone cylinder 46 be higher than the first upper conical 42 upper end edge of guide shell, the lower end of lower shunting cone cylinder 47 and
Second inferior pyramidal guide shell, 45 upper end edge flushes；
Circulation road under tube wall melt is formed between upper shunting 46 outer surface of cone cylinder and the second upper conical 43 outer surface of guide shell
48, it is lower shunting 44 outer surface of 47 outer surface of cone cylinder and the first inferior pyramidal guide shell between formed blend melt under circulation road 49；
46 outer surface of upper shunting cone cylinder is equipped with central melt flow dividing structure 50, the lower end of central melt flow dividing structure 50 and pipe
48 lower end of circulation road crosses under wall melt.
Central melt flow dividing structure 50 includes a shunt cylinder 51 and several isocons 52, shunt cylinder 51 and isocon 52
It is each provided in shunting cone cylinder 46,51 open top of shunt cylinder, 51 upper end edge of shunt cylinder is horizontal, and isocon 52 is wide at the top and narrow at the bottom,
All isocons 52 are evenly arranged along upper shunting 46 circumferencial direction of cone cylinder, and 52 upper end of isocon is connected with 51 lower end of shunt cylinder, point
52 lower port of flow tube is located at 48 lower end of circulation road and the outside of 49 upper end intersection of circulation road under blend melt under tube wall melt.
Upper shunting cone cylinder 46 is internally formed preheating cavity 53 with lower shunting cone cylinder 47, the first inferior pyramidal guide shell 44 and the
Thermal cycle stream has been passed through in preheating cavity 54 under being internally formed of two inferior pyramidal guide shells 45, upper preheating cavity 53 and lower preheating cavity 54
Body medium.Heating agent conduit is inner to be connected with upper preheating cavity 53, and heating agent external catheter end is stretched out outside prepolymerization pipe.Heating agent conduit is to upper
Hot circulating fluid medium in preheating cavity 53 carries out circulation water conservancy diversion, and plays and shunt cone cylinder 46 and lower shunting cone cylinder in support positioning
47 effect.Wherein heating agent conduit does not illustrate in figure comes.
The polylactic acid slice addition titanium dioxide delustring spinning production of the present invention comprises the following steps that：
（1）, will participate in polymerization catalyst and stabilizer in fully fusion become suspension, suspension is injected into stirring
In tank 19, while lactide melt is injected into agitator tank, open agitator tank work, 20~40min of stirring melt, until mixing
Stop stirring after uniformly；
（2）, open the first autocontrol valve 23 of agitator tank 19 bottom, lactide melt is mixed by the first metering pump 24
Compound drops into through the first conveying pipeline 22 and preliminary polymerization operation is just carried out in poly- tank 20, in lactide melt mixture self gravitation
Under the action of, lactide melt mixture by polylactic acid pre-polymerization mixing device during enter after pre- hot mixing it is just poly-
In tank 20, it is that temperature is 100~150 DEG C to carry out preliminary polymerization operation in first poly- tank 20, time of preliminary polymerization operation for 1~
2h, pressure 0.2MPa, after preliminary polymerization operation, the mixture of lactide, titanium dioxide and solvent is aggregated into be sticky
Polylactic acid melt；
（3）, open just poly- 20 bottom of tank the second autocontrol valve 26, polylactic acid melt is passed through by the second metering pump 27
Second conveying pipeline 25 drops into the final polymerization operation of the interior progress of poly- tank 21 eventually, and final polymerization operation is that temperature is 150~280 DEG C,
The time of final polymerization operation is 1~6h, pressure 0.3MPa；
（4）, open the 3rd autocontrol valve of poly- 21 bottom of tank eventually, the polylactic acid melt in poly- tank 21 is through the 3rd conveying eventually
Pipe 28 is discharged, and the 3rd metering pump 29 set on the 3rd conveying pipeline 28 provides the dynamic of metering, filtering and conveying for polylactic acid melt
Power, clean, uniformly mixed polylactic acid melt is extruded as band strip by polylactic acid melt extrusion orifice plate 32, then to polylactic acid
Melt carries out water cooling；
（5）, polylactic acid melt water cooling be solidified to operation pelleter 17 after room temperature and carry out section operation, pelleter 17 is by tape
The polylactic acid melt of shape is cut into polylactic acid slice（It is granular）, polylactic acid slice is transported in vulcanization crystallizing bed 60 by conveyer
Crystallized, polylactic acid slice is transported to drying tower 61 and is dried after crystallization；
（6）, dried polylactic acid dry chip is stored into the second feed bin 63, dry titanium dioxide dry powder is stored
Into the first feed bin 62,63 bottom of the second feed bin is connected by main tremie pipe 67 with the feed inlet of spinning screw extruder 65；
（7）, the titanium dioxide dry powder in the first feed bin 62 dropped into by gravity in powder meter 71, powder meter 71
Titanium dioxide dry powder is measured；What the polylactic acid dry chip in the second feed bin 63 fell by gravity in main tremie pipe 67
Meanwhile compressed air system 64 is blown into dry compressed air into air hose 68, the dioxy that will be measured by powder meter 71
Change titanium dry powder to be blown into main tremie pipe 67, wind speed size can be adjusted in adjusting air valve 69, to adapt to titanium dioxide dry powder
With the mixing of polylactic acid dry chip different proportion, titanium dioxide dry powder falls after being mixed in main tremie pipe 67 with polylactic acid dry chip
Enter into spinning screw extruder 65；
（8）, spinning screw extruder 65 by titanium dioxide dry powder and polylactic acid dry chip be heated to 200-300 DEG C be made it is poly-
Lactic acid melt；
（9）, spinning screw extruder 65 discharge pressure effect under, the polylactic acid melt after filtering passes through melt pipe
72 are fed in spinning manifold 66, and the sound integrated pipeline formula mixing device 31 installed on melt pipe 72 is further uniformly mixed
Close polylactic acid melt；
（10）, the spinning pump 73 in spinning manifold 66 will enter filament spinning component after polylactic acid melt metering supercharging
74, polylactic acid melt is spun into delustring or semi-dull acid fiber by polylactic by filament spinning component 74.
The step（2）Middle lactide melt mixture carries out the tool of pre- hot mixing by polylactic acid pre-polymerization mixing device 40
Body process is：
Lactide melt mixture flows downward in prepolymerization pipe 41；What setting flowed downward along 41 center of prepolymerization pipe
Lactide melt mixture is melt A, and the lactide melt mixture to flow downward along 41 tube wall of prepolymerization pipe is melt B；In advance
Melt A at 41 center of polymerization pipe enters shunt cylinder 51 along 46 surface of upper shunting cone cylinder, and melt A is automatic by isocon 52 again
48 lower end of circulation road and the outside of the intersection of 49 upper end of circulation road under blend melt under tube wall melt are flowed to, at the same time, is leaned on
The melt B of nearly 41 tube wall of prepolymerization pipe is entered under tube wall melt in circulation road 48 by the first upper conical guide shell 42, is flowed to
It is located at the top of melt A under tube wall melt behind 48 lower end of circulation road, i.e. melt A and melt B enter circulation road 49 under blend melt
Afterwards, melt A is located at lower floor, and melt B is located at upper strata, when melt A and melt B flow to 49 lower end of circulation road under blend melt and export
When, melt B is located among melt A, i.e., melt A is transformed into by center and continues to flow downward along tube wall, and melt B is by close to tube wall
The center of being transformed into continues to flow downward, and during transposition, melt A and melt B are also definitely mixed.It is hollow in Fig. 5
The flow direction for being oriented to melt A of arrow, the flow direction for being oriented to melt B of filled arrows.
During melt mixed transposition, hot circulating fluid medium is passed through in upper preheating cavity 53 and lower preheating cavity 54,
Hot circulating fluid medium can add thermal medium such as according to technological requirement；Biphenyl Ether, conduction oil etc., preheat melt,
To facilitate control prepolymerization process.The present invention takes no dead angle design in the junction of all parts.A piece prepolymerization pipe 41
Multigroup batch mixing preheater can be inside installed from top to bottom.
Step（9）The detailed process that middle sound integrated pipeline formula mixing device 31 mixes polylactic acid melt is：
Under the action of spinning screw extruder 65, the polylactic acid after polymerization is entered by fixed -piping 1, when sticky melt leads under high pressure
When crossing dynamic mixture pipeline 3, dynamic screw partition plate 4 starts to rotate under the promotion of melt, the inner wall of dynamic mixture pipeline 3
On viscous melt scraped by rotating dynamic screw partition plate 4, it is diluter among the viscous melt that scrapes and dynamic mixture pipeline 3
Melt mix, and push ahead spiral logical to the 3rd semicircle helical duct 8 in static batch mixing pipeline 2 and the 4th semicircle
Mixed in road 9, entered back into after mixing and above-mentioned mixing process is repeated in dynamic mixture pipeline 3.Since the first semicircle is spiral
5 and second semicircle of passage spiral logical 6 is longer and is set in the axial direction for the hand of spiral, thus can be in pressurized melt
By when, driving dynamic screw partition plate 4 rotates；The top shape coordinated with cone tank top pressure of rotary material of dynamic screw partition plate 4
Formula, is not only easy to manufacture and assembles, and the frictional force smaller in rotary course, so as to improve 4 scraper of dynamic screw partition plate
Efficiency.The length of static batch mixing pipeline 2 is less than the length of dynamic mixture pipeline 3, can so make whole melt pipe 72（By static state
Batch mixing pipeline 2 and dynamic mixture pipeline 3 form）Most of length all can be by the king-sized poly- breast of the viscosity adhered on tube wall
Acid is wiped off, fully improves the uniformity of mixing.
The present embodiment is not the limitations of work in any form such as the shape to the present invention, material, structure, every according to this hair
Any simple modification, equivalent change and modification that bright technical spirit makees above example, belongs to the technology of the present invention side
The protection domain of case.
Claims (9)
1. polylactic acid slice adds titanium dioxide delustring spinning production technology, it is characterised in that：The life that the production technology uses
Producing equipment includes aggregation framework, pelleter, cooling bay, the crystallizing bed, drying tower of vulcanization, the first feed bin, the second feed bin, compressed air
System, spinning screw extruder and spinning manifold, agitator tank, first poly- tank and poly- eventually are equipped with aggregation framework successively from top to bottom
Tank, stirring pot bottom are connected by the first conveying pipeline with first poly- tank top, and the first conveying pipeline is filled equipped with polylactic acid pre-polymerization batch mixing
Put, the first autocontrol valve and the first metering pump, first poly- pot bottom is connected by the second conveying pipeline with end poly- tank top, and second is defeated
Expects pipe is equipped with the second autocontrol valve and the second metering pump, and poly- pot bottom is connected with the 3rd conveying pipeline eventually, on the 3rd conveying pipeline
Equipped with the 3rd metering pump, the discharge port of the 3rd conveying pipeline is connected with the polylactic acid melt extrusion orifice plate above cooling bay, cold
But cooling water is loaded with pond, the working end of pelleter is located in cooling bay, and the discharge end of pelleter is located at outside cooling bay and leads to
Cross conveyer and be connected with vulcanizing crystallizing bed feed end, the feed inlet for vulcanizing crystallizing bed discharge end and drying tower connects, dry
The discharge port of tower is connected with the feed inlet of the second feed bin；
The discharge port of second feed bin is connected by main tremie pipe with the feed inlet of spinning screw extruder, and compressed air system goes out
Air hose is provided tiltedly between air port and main tremie pipe, air hose and the position of compressed air system connecting pin are higher than air hose and main blanking
The position of pipe connecting pin, air hose are equipped with the adjusting air valve of neighbouring compressed air system, and the discharge port of the first feed bin passes through mixing
Expects pipe is connected with air hose, and mix tube is equipped with powder meter, the discharge port of spinning screw extruder by melt pipe with
Spinning manifold connects, and melt pipe is equipped with sound integrated pipeline formula mixing device, be equipped with spinning manifold spinning pump with
Filament spinning component, the discharge port of melt pipe extend into spinning manifold and are connected with the feed inlet of spinning pump, spinning measuring
The outlet of pump and the import of filament spinning component connect；
The production technology includes step in detail below：
（1）, will participate in polymerization catalyst and stabilizer in fully fusion become suspension, suspension is injected into agitator tank
It is interior, while lactide melt is injected into agitator tank, open agitator tank work, 20~40min of stirring melt, until being uniformly mixed
Stop stirring afterwards；
（2）, open stirring pot bottom the first autocontrol valve, by the first metering pump by lactide melt mixture through first
Conveying pipeline, which drops into, just carries out preliminary polymerization operation in poly- tank, under the action of lactide melt mixture self gravitation, third hands over
Ester melt blend by polylactic acid pre-polymerization mixing device during enter after pre- hot mixing in first poly- tank, in first poly- tank
Interior progress preliminary polymerization operation is that temperature is 100~150 DEG C, and time of preliminary polymerization operation is 1~2h, pressure 0.2MPa,
After preliminary polymerization operation, lactide, titanium dioxide, the mixture of catalyst and stabilizer are aggregated into and are melted for sticky polylactic acid
Body；
（3）, open just poly- pot bottom the second autocontrol valve, by the second metering pump by polylactic acid melt through the second conveying pipeline
The final polymerization operation of the interior progress of poly- tank eventually is dropped into, final polymerization operation is that temperature is 150~280 DEG C, finally polymerize operation
Time is 1~6h, pressure 0.3MPa；
（4）, open the 3rd autocontrol valve of poly- pot bottom eventually, the polylactic acid melt in poly- tank is discharged through the 3rd conveying pipeline eventually,
The 3rd metering pump set on 3rd conveying pipeline provides the power of metering, filtering and conveying for polylactic acid melt, and clean, mixing is
Even polylactic acid melt is extruded as band strip by polylactic acid melt extrusion orifice plate, then carries out water cooling to polylactic acid melt；
（5）, polylactic acid melt water cooling be solidified to operation pelleter after room temperature and carry out section operation, pelleter is by the poly- breast with strip
Sour melt is cut into polylactic acid slice, by conveyer by polylactic acid slice be transported to vulcanization it is crystallizing bed on crystallized, after crystallization
Polylactic acid slice is transported to drying tower and is dried；
（6）, dried polylactic acid dry chip is stored into the second feed bin, by dry titanium dioxide dry powder storage to first
In feed bin, the second bin bottom is connected by main tremie pipe with the feed inlet of spinning screw extruder；
（7）, the titanium dioxide dry powder in the first feed bin dropped into by gravity in powder meter, powder meter is to titanium dioxide
Dry powder is measured；While polylactic acid dry chip in the second feed bin falls by gravity in main tremie pipe, compressed air
System is blown into dry compressed air into air hose, and the titanium dioxide dry powder measured by powder meter is blown into main blanking
In pipe, wind speed size can be adjusted in adjusting air valve, to adapt to titanium dioxide dry powder and polylactic acid dry chip different proportion
Mixing, titanium dioxide dry powder are dropped into after being mixed in main tremie pipe with polylactic acid dry chip in spinning screw extruder；
（8）, titanium dioxide dry powder and polylactic acid dry chip is heated to 200-300 DEG C polylactic acid is made to melt by spinning screw extruder
Body；
（9）, spinning screw extruder discharge pressure effect under, the polylactic acid melt after filtering is admitted to by melt pipe
Into spinning manifold, the sound integrated pipeline formula mixing device installed on melt pipe further uniformly mixes polylactic acid melt；
（10）, the spinning pump in spinning manifold will enter filament spinning component, filament spinning component after polylactic acid melt metering supercharging
Polylactic acid melt is spun into delustring or semi-dull acid fiber by polylactic.
2. polylactic acid slice according to claim 1 adds titanium dioxide delustring spinning production technology, it is characterised in that：It is poly-
Lactic acid pre-polymerization mixing device includes the prepolymerization pipe being arranged in vertical, and is mixed from top to bottom at least provided with two in prepolymerization pipe
Expect preheater, all equal structures of batch mixing preheater are identical；
Each batch mixing preheater include the first upper conical guide shell with same center line, the second upper conical guide shell,
First inferior pyramidal guide shell, the second inferior pyramidal guide shell, upper shunting cone cylinder and lower shunting cone cylinder；
First upper conical guide shell and the first inferior pyramidal guide shell are upper coarse and lower fine and upper and lower permeable structures, and first upper conical leads
Flow cartridge bottom diameter is more than the second upper conical guide shell bottom diameter, and the second upper conical guide shell and the second inferior pyramidal guide shell are equal
For up-thin-low-thick and upper and lower permeable structures, the first upper conical guide shell bottom diameter and the second upper conical guide shell upper-end inner diameter phase
Deng the first inferior pyramidal guide shell bottom diameter is equal with the second inferior pyramidal guide shell upper-end inner diameter, on the first upper conical guide shell
Hold under outer, the second upper conical guide shell lower end outer, the first inferior pyramidal guide shell upper end edge and the second inferior pyramidal guide shell
End edge edge is fixedly connected with prepolymerization inside pipe wall, the first upper conical guide shell lower end edge and the second upper conical guide shell upper end
Edge is fixedly connected, and the first upper conical guide shell lower end edge is fixedly connected with the second upper conical guide shell upper end edge, and first
Inferior pyramidal guide shell lower end edge is fixedly connected with the second inferior pyramidal guide shell upper end edge；
Upper shunting cone cylinder sharply blocks for top, the structure of bottom opening, and lower shunting cone cylinder sharply blocks for bottom, open top
Structure, upper shunting cone cylinder bottom diameter is equal to lower shunting cone cylinder upper-end inner diameter, and upper shunting cone cylinder bottom diameter is less than prepolymerization
Bore, upper shunting cone cylinder lower end edge are fixedly connected with lower shunting cone cylinder upper end edge；Upper shunting cone cylinder and lower shunting cone cylinder
Outer wall is fixedly connected by heating agent conduit with prepolymerization inside pipe wall；
The upper end of upper shunting cone cylinder is higher than the first upper conical guide shell upper end edge, the lower end of lower shunting cone cylinder and the second inferior pyramidal
Guide shell upper end edge flushes；
Circulation road under tube wall melt, lower spreader are formed between upper shunting cone cylinder outer surface and the second upper conical guide shell outer surface
Circulation road under blend melt is formed between cylinder outer surface and the first inferior pyramidal guide shell outer surface；
Upper shunting cone cylinder outer surface is equipped with central melt flow dividing structure, and lower end and the tube wall melt of central melt flow dividing structure flow down
Passage lower end crosses.
3. polylactic acid slice according to claim 1 adds titanium dioxide delustring spinning production technology, it is characterised in that：It is dynamic
Quiet integrated pipeline formula mixing device includes fixed -piping and batch mixing unit, and batch mixing unit includes the static mixing tube of coaxial setting
Road and dynamic mixture pipeline, the right end flanged joint of the left end of dynamic mixture pipeline and static batch mixing pipeline, dynamic mixture pipeline
Interior to be equipped with dynamic screw partition plate, axially inside to be separated into the first semicircle spiral in direction by dynamic mixture pipeline for dynamic screw partition plate
Passage and the second semicircle helical duct, dynamic screw partition plate and dynamic mixture inner-walls of duct clearance fit；In static batch mixing pipeline
Equipped with static ribbon partition plate, axially inside to be separated into the 3rd semicircle spiral logical in direction by static batch mixing pipeline for static ribbon partition plate
Road and the 4th semicircle helical duct, static ribbon partition plate are fixedly connected with static batch mixing inner-walls of duct；
Plane where the both ends of dynamic screw partition plate and static ribbon partition plate is each perpendicular to the central shaft of dynamic mixture pipeline
Line, dynamic screw partition plate right part center are equipped with dynamic cone tank, and dynamic screw partition plate left part center is top equipped with dynamic, quiet
State helical baffle right part center is equipped with static cone tank, and static ribbon partition plate left part center is top equipped with static state, and dynamic is pushed up
Sharp left end is withstood in static cone tank；
Fixed -piping left end and dynamic mixture pipeline right end flanged joint, fixed -piping is interior to be equipped with stent, and stent, which is equipped with, to be fixed
Top, stationary center left end is withstood in dynamic cone tank.
4. polylactic acid slice according to claim 3 adds titanium dioxide delustring spinning production technology, it is characterised in that：It is mixed
The quantity of material unit is more than or equal to two groups, flanged joint between two adjacent groups batch mixing unit, one group of batch mixing unit it is static top
Left end is withstood in the dynamic cone tank of one group of adjacent batch mixing unit, one group of batch mixing unit connection of fixed -piping and low order end.
5. the polylactic acid slice addition titanium dioxide delustring spinning production technology according to claim 3 or 4, its feature exist
In：The length of static batch mixing pipeline is less than the length of dynamic mixture pipeline.
6. polylactic acid slice according to claim 2 adds titanium dioxide delustring spinning production technology, it is characterised in that：In
Heart melt flow dividing structure includes a shunt cylinder and several isocons, and shunt cylinder and isocon are each provided in shunting cone cylinder,
Shunt cylinder open top, shunt cylinder upper end edge is horizontal, and isocon is wide at the top and narrow at the bottom, and all isocons shunt cone cylinder circumference side along upper
To being evenly arranged, isocon upper end is connected with shunt cylinder lower end, shunting infratubal port be located under tube wall melt circulation road lower end and
The outside of circulation road upper end intersection under blend melt.
7. polylactic acid slice according to claim 6 adds titanium dioxide delustring spinning production technology, it is characterised in that：On
Shunting cone cylinder is internally formed preheating cavity with lower shunting cone cylinder, and the first inferior pyramidal guide shell is interior with the second inferior pyramidal guide shell
Portion forms lower preheating cavity, and hot circulating fluid medium has been passed through in upper preheating cavity and lower preheating cavity；Heating agent conduit it is inner with it is upper pre-
Hot chamber connection, heating agent external catheter end are stretched out outside prepolymerization pipe.
8. polylactic acid slice according to claim 7 adds titanium dioxide delustring spinning production technology, it is characterised in that：Institute
State step（2）The detailed process that middle lactide melt mixture carries out pre- hot mixing by polylactic acid pre-polymerization mixing device is：Third
Lactide melt blend flows downward in prepolymerization pipe；The lactide melt that setting flows downward along prepolymerization tube hub mixes
Thing is melt A, and the lactide melt mixture to flow downward along prepolymerization tube wall is melt B；Melt A shunts cone cylinder table along upper
Face enters shunt cylinder, and melt A flows under tube wall melt circulation road lower end with circulating under blend melt automatically by isocon again
The outside of the intersection of road upper end, at the same time, the melt B close to prepolymerization tube wall enter by the first upper conical guide shell
Under to tube wall melt in circulation road, flow under tube wall melt and be located at the top of melt A, i.e. melt A and melt B behind circulation road lower end
Under into blend melt after circulation road, melt A is located at lower floor, and melt B is located at upper strata, when melt A and melt B flow to mixing and melt
When circulation road lower end exports under body, melt B is located among melt A, i.e. melt A is transformed into from center to be continued to dirty along tube wall
Dynamic, melt B continues to flow downward by being transformed into center close to tube wall, and during transposition, melt A and melt B have also carried out one
The mixing of certainty ratio.
9. polylactic acid slice according to claim 5 adds titanium dioxide delustring spinning production technology, it is characterised in that：Institute
State step（9）The detailed process that middle sound integrated pipeline formula mixing device mixes polylactic acid melt is：In spinning screw
Extruder discharge pressure effect under, the polylactic acid melt after polymerization is entered by fixed -piping, when sticky melt under high pressure
When by dynamic mixture pipeline, dynamic screw partition plate starts to rotate under the promotion of melt, the inner wall of dynamic mixture pipeline
On viscous melt scraped by rotating dynamic screw partition plate, it is diluter among the viscous melt and dynamic mixture pipeline scraped
Melt mixes, and pushes ahead into the 3rd semicircle helical duct and the 4th semicircle helical duct in static batch mixing pipeline
Mixed, entered back into after mixing and above-mentioned mixing process is repeated in dynamic mixture pipeline.
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| CN109881338A (en) * | 2019-03-29 | 2019-06-14 | 浦江环彩纺织有限公司 | A kind of preparation method and its preparation facilities of face cleaning material of removing ornaments and formal dress |
| CN115058790B (en) * | 2022-07-20 | 2024-03-15 | 扬州惠通生物新材料有限公司 | Preparation method of extinction polylactic acid fiber |
| CN115058789A (en) * | 2022-07-20 | 2022-09-16 | 扬州惠通生物新材料有限公司 | Preparation method of flexible antistatic polylactic acid fiber |
| CN117867672B (en) * | 2024-03-11 | 2024-06-14 | 江苏青昀新材料有限公司 | Flash evaporation non-woven fabric and spinning pump thereof |
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| CN104404636B (en) * | 2014-10-31 | 2016-07-13 | 河南省龙都生物科技有限公司 | Polylactic acid and the pouring-in blend spinning system of Masterbatch |
| CN204224750U (en) * | 2014-10-31 | 2015-03-25 | 河南省龙都生物科技有限公司 | The static mixing device for spinning of pouring-in blend spinning system |
| CN104562245B (en) * | 2015-01-28 | 2017-02-22 | 河南省龙都生物科技有限公司 | Polylactic acid double-component composite fiber double-spray-orifice parallel type spinning component |
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