CN105803565B - PLA delustering fibre direct fabrics production technology - Google Patents
PLA delustering fibre direct fabrics production technology Download PDFInfo
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- CN105803565B CN105803565B CN201610233620.9A CN201610233620A CN105803565B CN 105803565 B CN105803565 B CN 105803565B CN 201610233620 A CN201610233620 A CN 201610233620A CN 105803565 B CN105803565 B CN 105803565B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
-
- 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
- D01D13/02—Elements of machines in combination
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
Abstract
PLA delustering fibre direct fabrics production technology, comprises the following steps:（1）, titanium dioxide, catalyst, stabilizer fully merged are added to as suspension, lactide and suspension in agitator tank；（2）, lactide mixture after the pre- hot mixing of PLA pre-polymerization mixing device to carrying out preliminary polymerization in first poly- tank；（3）, finally polymerize in poly- tank eventually；（4）, the 3rd measuring pump polylactic acid melt is passed through into sound integrated pipeline formula mixing device mixing weighing again；And it is sent into spinning manifold（5）, spinning carried out by filament spinning component after the supercharging of spinning measuring pump-metered.Present invention ensure that the melt in prepolymerization pipe 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 PLA delustering fibre direct fabrics production work
Skill.
Background technology
Poly lactic acid polymerized process includes pre-polymerization and gathered 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 provided 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 individual aspect and the solution temperature of prepolymerization tube hub be desirably also；3rd, due to being used to convey PLA 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 can not effectively filter out, so as to 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 weak point 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 with the melt at center and mixes keeping temperature
Unanimously, the PLA delustering fibre direct fabrics production technology being well mixed in poly- rear course of conveying eventually.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：PLA delustering fibre direct fabrics produce
Technique, the PLA delustring section production equipment that the production technology uses include aggregation framework and spinning manifold, aggregation framework
On be sequentially provided with agitator tank, first poly- tank from top to bottom and poly- tank, stirring pot bottom pass through the first conveying pipeline and first poly- tank top eventually
Connection, the first conveying pipeline are provided with PLA pre-polymerization mixing device, the first autocontrol valve and the first measuring pump, first poly- pot bottom
It is connected by the second conveying pipeline with poly- tank top eventually, the second conveying pipeline is provided with the second autocontrol valve and the second measuring pump, eventually
Poly- pot bottom is connected with the 3rd conveying pipeline, and the 3rd measuring pump and sound one are sequentially provided with along melt flows direction on the 3rd conveying pipeline
Body duct type mixing device, spinning manifold is interior to be provided with spinning pump and filament spinning component, and the discharging opening of the 3rd conveying pipeline is extend into
It is connected in spinning manifold and with the charging aperture of spinning pump, the discharging opening of spinning pump and the charging aperture of filament spinning component connect
Connect；
The production technology comprises the following steps：
（1）, by mass fraction be 0.2%~3% titanium dioxide be added to participate in polymerization catalyst and stabilizer in
Fully fusion turns into suspension, and suspension is injected into agitator tank, while lactide melt is injected into agitator tank, and unlatching is stirred
Tank work is mixed, stirs 20~40min of melt, stops stirring after well mixed；
（2）, open stirring pot bottom the first autocontrol valve, lactide melt mixture is passed through by the first measuring pump
First conveying pipeline, which drops into, just carries out preliminary polymerization operation in poly- tank, in the presence of lactide melt mixture self gravitation,
Lactide melt mixture by PLA 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 measuring 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 measuring pump provides the power of metering, filtering and conveying for polylactic acid melt, and sound integrated pipeline formula mixing device is to poly-
Lactic acid melt is mixed, and polylactic acid melt is measured and be transported in spinning manifold by the 3rd measuring pump；
（5）, spinning pump by polylactic acid melt metering supercharging after enter filament spinning component, filament spinning component melts PLA
Body is spun into acid fiber by polylactic.
PLA pre-polymerization mixing device includes the prepolymerization pipe that is arranged in vertical, in prepolymerization pipe from top to bottom at least
Provided 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 is the structure that top sharply blocks, bottom is open, 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 spreader tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface, lower point
Circulation road under blend melt is formed between flow cone tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface；
Upper spreader tube outer surface is provided 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 left end of dynamic mixture pipeline are connected with the right-hand member flange of static batch mixing pipeline, are moved
It is provided with dynamic screw dividing plate in state batch mixing pipeline, axially inside direction is separated into the to dynamic screw dividing plate by dynamic mixture pipeline
One semicircle helical duct and the second semicircle helical duct, dynamic screw dividing plate coordinate with dynamic mixture inner-walls of duct gap；It is static
Static ribbon dividing plate is provided with batch mixing pipeline, static batch mixing pipeline is axially inside separated into the 3rd in direction by static ribbon dividing plate
Semicircle helical duct and the 4th semicircle helical duct, static ribbon dividing plate are fixedly connected with static batch mixing inner-walls of duct；
Plane where the both ends of dynamic screw dividing plate and static ribbon dividing plate is each perpendicular in dynamic mixture pipeline
Mandrel line, dynamic screw dividing plate right part center are provided with dynamic cone tank, and dynamic screw dividing plate left part center is provided with dynamic and pushed up
Point, static ribbon dividing plate right part center are provided with static cone tank, and static ribbon dividing plate left part center is top provided with static state, moves
The top left end of state is withstood in static cone tank；
Fixed -piping left end is connected with dynamic mixture pipeline right-hand member flange, is provided with support in fixed -piping, support is provided 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, and flange connects 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, all isocon edges of isocon
Upper shunting cone cylinder circumferencial direction is evenly arranged, and isocon upper end connects with shunt cylinder lower end, and shunting infratubal port melts positioned at tube wall
Circulation road lower end and the outside of circulation road upper end intersection under blend melt under body.
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 PLA 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 be flowed 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（4）The detailed process that middle sound integrated pipeline formula mixing device is mixed to polylactic acid melt is：
In the presence of the 3rd measuring pump, the polylactic acid melt after polymerization is entered by fixed -piping, when sticky melt leads under high pressure
When crossing dynamic mixture pipeline, dynamic screw dividing plate starts to rotate under the promotion of melt, on the inwall of dynamic mixture pipeline
The dynamic screw dividing plate that is rotated of viscous melt scrape, diluter among the viscous melt and dynamic mixture pipeline scraped must melt
Body mixes, and pushes ahead into the 3rd semicircle helical duct and the 4th semicircle helical duct in static batch mixing pipeline
Row mixing, enters 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 the 3rd conveying pipeline, after some groups of batch mixing units, entered
In spinning manifold, spinning pump will enter filament spinning component after polylactic acid melt metering supercharging, and filament spinning component melts PLA
Body is spun into bamboo charcoal acid fiber by polylactic.Because the first semicircle helical duct and the second semicircle helical duct are longer and in axial side
Set upwards for the hand of spiral, thus can pressurized melt by when, driving dynamic screw dividing plate rotation；Dynamic screw dividing plate
The top form coordinated with cone tank top pressure of rotary material, be not only easy to manufacture and assemble, and rubbed in rotary course
Power is smaller, so as to improve the efficiency of dynamic screw dividing plate scraper.The length of static batch mixing pipeline is less than the length of dynamic mixture pipeline
Degree, it can so make most of length of the pipeline of whole conveying PLA all can be king-sized poly- by the viscosity adhered on tube wall
Lactic acid is wiped off, fully improves the uniformity of mixing.
Using the production technology of the present invention, according to fiber properties, the present invention adds certain proportion in poly-lactic acid material
（0.2%~3%）Fiber grade titanium dioxide（TiO2）, the feel of fiber improves significantly, larger to have light（Not plus TiO2）It is poly-
The obvious soft many of acid fiber.Secondly, dyeing kinetics are substantially reduced, and dyeing uniformity is improved.
In summary, principle of the invention science, reasonable in design, simple in construction, it is ensured that the melt in prepolymerization pipe is constant
Flowed 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 lists are directly set on the 3rd conveying pipeline
Member, eliminate and mixing system is installed on conveyance conduit, saved cost, reach the purpose of uniform batch mixing, convey and mixed
Material efficiency greatly improves.
Brief description of the drawings
Fig. 1 is the structural representation of the PLA delustring section production equipment of the present invention；
Fig. 2 is the structural representation of the invention for having in Fig. 1 one group of batch mixing unit；
Fig. 3 is the dimensional structure diagram of dynamic screw dividing plate in Fig. 2；
Fig. 4 is the dimensional structure diagram of static ribbon dividing plate in Fig. 2；
Fig. 5 is the structural representation of PLA 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, PLA delustring of the invention section production equipment, including aggregation framework 16 and spinning manifold
17, it is sequentially provided with agitator tank 19, first poly- tank 20 and poly- tank 21 eventually in aggregation framework 16 from top to bottom, the bottom of agitator tank 19 passes through the
One conveying pipeline 22 is connected with the just poly- top of tank 20, and it is automatic that the first conveying pipeline 22 is provided with PLA pre-polymerization mixing device 40, first
The measuring pump 24 of control valve 23 and first, the first poly- bottom of tank 20 are connected by the second conveying pipeline 25 with the poly- top of tank 21 eventually, and second is defeated
Expects pipe 25 is provided with the second autocontrol valve 26 and the second measuring pump 27, and the poly- bottom of tank 21 is connected with the 3rd conveying pipeline 28 eventually, the
On three conveying pipelines 28 the 3rd measuring pump 29 and sound integrated pipeline formula mixing device 31, spinning are sequentially provided with along melt flows direction
Spinning pump 18 and filament spinning component 32 are provided with casing 17, the discharging opening of the 3rd conveying pipeline 28 is extend into spinning manifold 17 simultaneously
It is connected with the charging aperture of spinning pump 18, the discharging opening of spinning pump 18 is connected with the charging aperture of filament spinning component 32.
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-hand member flange of the left end of dynamic mixture pipeline 3 and static batch mixing pipeline 2
Connection, is provided with dynamic screw dividing plate 4 in dynamic mixture pipeline 3, dynamic screw dividing 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 dividing plate 4 with dynamic mixture pipeline 3
Wall gap coordinates；Static ribbon dividing plate 7 is provided with static batch mixing pipeline 2, static ribbon dividing 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 dividing plate 7 and static batch mixing
The inwall of pipeline 2 is fixedly connected.
Plane where the both ends of dynamic screw dividing plate 4 and static ribbon dividing plate 7 is each perpendicular to dynamic mixture pipeline 3
Central axis, the right part center of dynamic screw dividing plate 4 are provided with dynamic cone tank 10, and the left part center of dynamic screw dividing plate 4 is provided with
Dynamically top 11, the right part center of static ribbon dividing plate 7 is provided with static cone tank 12, and the left part center of static ribbon dividing plate 7 is set
There is static state top 13, top 11 left end of dynamic is withstood in static cone tank 12.
The left end of fixed -piping 1 is connected with the right-hand member flange of dynamic mixture pipeline 3, and support 14, support 14 are provided with fixed -piping 1
Stationary center 15 is provided with, the left end of stationary center 15 is withstood in dynamic cone tank 10.
The quantity of batch mixing unit is more than or equal to two groups, and flange connects 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.
PLA pre-polymerization mixing device 40 includes the prepolymerization pipe 41 being arranged in vertical, and the both ends of prepolymerization pipe 41 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；
The first upper conical inferior pyramidal guide shell 44 of guide shell 42 and first is upper coarse and lower fine and upper and lower permeable structures, and first
The upper conical bottom diameter of guide shell 42 is more than the second upper conical bottom diameter of guide shell 43, 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 bottom diameter of guide shell 42 and the second epicone
The upper-end inner diameter of shape guide shell 43 is equal, the bottom diameter of the first inferior pyramidal guide shell 44 and the upper-end inner diameter of the second inferior pyramidal guide shell 45
It is equal, the first upper conical upper end outer of guide shell 42, the second upper conical lower end outer of guide shell 43, the first inferior pyramidal guide shell 44
Upper end edge and the lower end edge of the second inferior pyramidal guide shell 45 are fixedly connected with the inwall of prepolymerization pipe 41, the first upper conical water conservancy diversion
Cylinder 42 lower end edges be fixedly connected with the second upper conical upper end edge of guide shell 43, the first upper conical lower end edge of guide shell 42 and
The second upper conical upper end edge of guide shell 43 is fixedly connected, the lower end edge of the first inferior pyramidal guide shell 44 and the second inferior pyramidal water conservancy diversion
45 upper end edges of cylinder are fixedly connected；
Upper shunting cone cylinder 46 is the structure that top sharply blocks, bottom is open, lower shunting cone cylinder 47 be bottom sharply block,
The structure of open top, upper shunting cone cylinder 46 bottom diameter are equal to the lower shunting upper-end inner diameter of cone cylinder 47, upper shunting cone cylinder 46 lower end
Internal diameter is less than the internal diameter of prepolymerization pipe 41, and the upper shunting lower end edge of cone cylinder 46 is fixedly connected with lower shunting cone cylinder 47 upper end edge；On
Shunting cone cylinder 46 and the lower shunting outer wall of cone cylinder 47 are fixedly connected by heating agent conduit with the inwall of prepolymerization pipe 41；
The upper end of upper shunting cone cylinder 46 be higher than the first upper conical upper end edge of guide shell 42, the lower end of lower shunting cone cylinder 47 and
The upper end edge of second inferior pyramidal guide shell 45 flushes；
Circulation road under tube wall melt is formed between upper the shunting outer surface of cone cylinder 46 and the outer surface of the first inferior pyramidal guide shell 44
48, form circulation road 49 under blend melt between lower the shunting outer surface of cone cylinder 47 and the outer surface of the first inferior pyramidal guide shell 44；
Upper shunting cone cylinder 46 outer surface is provided with central melt flow dividing structure 50, the lower end of central melt flow dividing structure 50 and pipe
The lower end of circulation road 48 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, the open top of shunt cylinder 51, the upper end edge of shunt cylinder 51 is horizontal, and isocon 52 is wide at the top and narrow at the bottom,
All isocons 52 of isocon 52 are evenly arranged along the upper shunting circumferencial direction of cone cylinder 46, the upper end of isocon 52 and the lower end of shunt cylinder 51
Connection, the lower port of isocon 52 are located at the lower end of circulation road 48 and the upper end intersection of circulation road 49 under blend melt under tube wall melt
Outside.
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 PLA delustering fibre direct fabrics production technology of the present invention comprises the following steps that：
（1）, by mass fraction be 0.2%~3%（It is preferred that 1%）Titanium dioxide（TiO2）It is added to solvent（Participate in polymerization
Catalyst, stabilizer equal solvent）In fully fusion turn into suspension, suspension is injected into agitator tank 19, while to stirring
Injection lactide melt in tank is mixed, agitator tank work is opened, stirs 20~40min of melt, stop stirring after well mixed；
（2）, open the first autocontrol valve 23 of agitator tank 19 bottom, lactide melt is mixed by the first measuring 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
In the presence of, lactide melt mixture by PLA pre-polymerization mixing device 40 during enter just after pre- hot mixing
In poly- tank 20, preliminary polymerization operation is that temperature is 100~150 DEG C, 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 the poly- bottom of tank 20 the second autocontrol valve 26, polylactic acid melt is passed through by the second measuring 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 the poly- bottom of tank 21 eventually, the polylactic acid melt in poly- tank 21 is through the 3rd conveying eventually
Pipe 28 is discharged, and the 3rd conveying pipeline 28 is provided with the 3rd measuring pump 29 and sound integrated pipeline formula mixing device 31, the 3rd measuring pump
29 provide the power of metering, filtering and conveying for polylactic acid melt, and sound integrated pipeline formula mixing device 31 is to polylactic acid melt
Mixed, polylactic acid melt is measured and be transported in spinning manifold 17 by the 3rd measuring pump 29；
（5）, spinning pump 18 will enter filament spinning component 32 after polylactic acid melt metering supercharging, filament spinning component 32 will be poly-
Lactic acid melt is spun into acid fiber by polylactic.
Step（2）Middle lactide melt mixture carries out the specific mistake of pre- hot mixing by PLA pre-polymerization mixing device 40
Cheng Wei：
Lactide melt mixture flows downward in prepolymerization pipe 41；What setting flowed downward along the center of prepolymerization pipe 41
Lactide melt mixture is melt A, and the lactide melt mixture to be flowed downward along the tube wall of prepolymerization pipe 41 is melt B；In advance
Melt A at the center of polymerization pipe 41 enters shunt cylinder 51 along upper shunting cone cylinder 46 surface, and melt A is automatic by isocon 52 again
The lower end of circulation road 48 and the outside of the intersection of the upper end of circulation road 49 under blend melt under tube wall melt are flowed to, at the same time, is leaned on
The melt B of the nearly tube wall of prepolymerization pipe 41 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 melt A top under tube wall melt behind the lower end of circulation road 48, 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 the lower end of circulation road 49 under blend melt and exported
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., are preheated to 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（4）The detailed process that middle sound integrated pipeline formula mixing device 31 is mixed to polylactic acid melt is：
In the presence of 3rd measuring pump 29, the PLA after polymerization is entered by fixed -piping 1, when sticky melt is under high pressure by dynamic
When state batch mixing pipeline 3, dynamic screw dividing plate 4 starts to rotate under the promotion of melt, on the inwall of dynamic mixture pipeline 3
The dynamic screw dividing plate 4 that viscous melt is rotated scrapes, the viscous melt scraped and diluter must melt of the centre of dynamic mixture pipeline 3
Body mixes, and pushes ahead to the 3rd semicircle helical duct 8 and the 4th semicircle helical duct 9 in static batch mixing pipeline 2
Inside mixed, entered back into after mixing and above-mentioned mixing process is repeated in dynamic mixture pipeline 3, by some groups of batch mixing units
Afterwards, polylactic acid melt is entered in spinning manifold 17, and spinning pump 18 will enter spinning after polylactic acid melt metering supercharging
Polylactic acid melt is spun into bamboo charcoal acid fiber by polylactic by component 32, filament spinning component 32.Due to the first semicircle helical duct 5 and second
Semicircle spiral logical 6 is longer and is set in the axial direction for the hand of spiral, thus can pressurized melt by when, driving
Dynamic screw dividing plate 4 rotates；The top form coordinated with cone tank top pressure of rotary material of dynamic screw dividing plate 4, is not only easy to
Manufacture and assembling, and frictional force is smaller in rotary course, so as to improve the efficiency of the scraper of dynamic screw dividing plate 4.Static state is mixed
The length of pipe material 2 is less than the length of dynamic mixture pipeline 3, can so make whole 3rd conveying pipeline 28（By static batch mixing pipeline 2
Formed with dynamic mixture pipeline 3）Most of length the king-sized PLA of the viscosity adhered on tube wall can all be wiped off, fill
Divide the uniformity for improving mixing.
The present embodiment is not that the shape to the present invention, material, structure etc. make any formal limitation, every according to this hair
Any simple modification, equivalent change and modification that bright technical spirit is made to above example, belongs to the technology of the present invention side
The protection domain of case.
Claims (8)
1. PLA delustering fibre direct fabrics production technology, it is characterised in that：The PLA delustring that the production technology uses
Section production equipment include aggregation framework and spinning manifold, be sequentially provided with from top to bottom in aggregation framework agitator tank, first poly- tank and
Poly- tank eventually, stirring pot bottom are connected by the first conveying pipeline with first poly- tank top, and the first conveying pipeline mixes provided with PLA pre-polymerization
Expect device, the first autocontrol valve and the first measuring pump, first poly- pot bottom is connected by the second conveying pipeline with poly- tank top eventually, the
Two conveying pipelines are provided with the second autocontrol valve and the second measuring pump, and poly- pot bottom is connected with the 3rd conveying pipeline, the 3rd conveying eventually
The 3rd measuring pump and sound integrated pipeline formula mixing device are sequentially provided with along melt flows direction on pipe, is provided with and spins in spinning manifold
Thread metering pump and filament spinning component, the discharging opening of the 3rd conveying pipeline extend into spinning manifold and connected with the charging aperture of spinning pump
Connect, the discharging opening of spinning pump and the charging aperture of filament spinning component connect；
The production technology comprises the following steps：
（1）, by mass fraction be 0.2%~3% titanium dioxide be added to participate in polymerization catalyst and stabilizer in fully
Fusion turns into suspension, and suspension is injected into agitator tank, while lactide melt is injected into agitator tank, opens agitator tank
Work, 20~40min of melt is stirred, stop stirring after well mixed；
（2）, open stirring pot bottom the first autocontrol valve, by the first measuring pump by lactide melt mixture through first
Conveying pipeline, which drops into, just carries out preliminary polymerization operation in poly- tank, in the presence of lactide melt mixture self gravitation, third hands over
Ester melt blend by PLA 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 melted for sticky PLA
Body；
（3）, open just poly- pot bottom the second autocontrol valve, by the second measuring 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,
3rd measuring pump provides the power of metering, filtering and conveying for polylactic acid melt, and sound integrated pipeline formula mixing device is to poly- breast
Sour melt is mixed, and polylactic acid melt is measured and be transported in spinning manifold by the 3rd measuring pump；
（5）, spinning pump by polylactic acid melt metering supercharging after enter filament spinning component, filament spinning component spins polylactic acid melt
Acid fiber by polylactic is made；
PLA pre-polymerization mixing device includes the prepolymerization pipe that is arranged in vertical, in prepolymerization pipe from top to bottom at least provided with
Two batch mixing preheaters, 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 is the structure that top sharply blocks, bottom is open, 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 spreader tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface
Circulation road under blend melt is formed between tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface；
Upper spreader tube outer surface is provided 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.
2. PLA delustering fibre direct fabrics production technology according to claim 1, it is characterised in that：Sound integral tube
Road formula mixing device includes fixed -piping and batch mixing unit, and batch mixing unit includes the static batch mixing pipeline and dynamic of coaxial setting
Batch mixing pipeline, the left end of dynamic mixture pipeline are connected with the right-hand member flange of static batch mixing pipeline, are provided with dynamic mixture pipeline dynamic
State helical baffle, by dynamic mixture pipeline, axially inside direction is separated into the first semicircle helical duct and to dynamic screw dividing plate
Two semicircle helical ducts, dynamic screw dividing plate coordinate with dynamic mixture inner-walls of duct gap；Static state is provided with static batch mixing pipeline
Helical baffle, by static batch mixing pipeline, axially inside direction is separated into the 3rd semicircle helical duct and the 4th to static ribbon dividing plate
Semicircle helical duct, static ribbon dividing plate are fixedly connected with static batch mixing inner-walls of duct；
Plane where the both ends of dynamic screw dividing plate and static ribbon dividing plate is each perpendicular to the central shaft of dynamic mixture pipeline
Line, dynamic screw dividing plate right part center are provided with dynamic cone tank, and dynamic screw dividing plate left part center is top provided with dynamic, quiet
State helical baffle right part center is provided with static cone tank, and static ribbon dividing plate left part center is provided with static top, dynamic top
Sharp left end is withstood in static cone tank；
Fixed -piping left end is connected with dynamic mixture pipeline right-hand member flange, and support is provided with fixed -piping, and support, which is provided with, to be fixed
Top, stationary center left end is withstood in dynamic cone tank.
3. PLA delustering fibre direct fabrics production technology according to claim 2, it is characterised in that：Batch mixing unit
Quantity is more than or equal to two groups, and flange is connected between two adjacent groups batch mixing unit, and the static top left end of one group of batch mixing unit is withstood on
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.
4. PLA delustering fibre direct fabrics production technology according to claim 3, it is characterised in that：Static mixing tube
The length in road is less than the length of dynamic mixture pipeline.
5. PLA delustering fibre direct fabrics production technology according to claim 1, it is characterised in that：Central melt point
Flow structure includes a shunt cylinder and several isocons, and shunt cylinder and isocon are each provided in shunting cone cylinder, shunt cylinder top
Portion is open, and shunt cylinder upper end edge is horizontal, and isocon is wide at the top and narrow at the bottom, and all isocons of isocon shunt cone cylinder circumferencial direction along upper
It is evenly arranged, isocon upper end connects with shunt cylinder lower end, and shunting infratubal port is located at circulation road lower end under tube wall melt and mixed
Close the outside of circulation road upper end intersection under melt.
6. PLA delustering fibre direct fabrics production technology according to claim 5, it is characterised in that：Upper shunting cone cylinder
With the upper preheating cavity that is internally formed of lower shunting cone cylinder, under being internally formed of the first inferior pyramidal guide shell and the second inferior pyramidal guide shell
Hot circulating fluid medium has been passed through in preheating cavity, upper preheating cavity and lower preheating cavity；Heating agent conduit is inner to be connected with upper preheating cavity,
Heating agent external catheter end is stretched out outside prepolymerization pipe.
7. PLA delustering fibre direct fabrics production technology according to claim 6, it is characterised in that：The step
（2）The detailed process that middle lactide melt mixture carries out pre- hot mixing by PLA pre-polymerization mixing device is：Lactide melts
Body mixture flows downward in prepolymerization pipe；It is molten to set the lactide melt mixture to be flowed downward along prepolymerization tube hub
Body A, the lactide melt mixture to be flowed downward along prepolymerization tube wall are melt B；Melt A enters along upper shunting cone surface
To shunt cylinder, melt A flows to circulation road lower end and circulation road upper end under blend melt under tube wall melt automatically by isocon again
Intersection outside, at the same time, the melt B close to prepolymerization tube wall enters tube wall by the first upper conical guide shell
Under melt in circulation road, flow under tube wall melt and be located at melt A top behind circulation road lower end, be i.e. melt A and melt B enter mixed
Close under 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 blend melt and flowed down
When passage lower end exports, melt B is located among melt A, i.e., melt A is transformed into by center and continues to flow downward along tube wall, melts
Body 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 certain proportion
Mixing.
8. PLA delustering fibre direct fabrics production technology according to claim 4, it is characterised in that：The step
（4）The detailed process that middle sound integrated pipeline formula mixing device is mixed to polylactic acid melt is：In the work of the 3rd measuring pump
Under, the polylactic acid melt after polymerization is entered by fixed -piping, when sticky melt passes through dynamic mixture pipeline under high pressure
When, dynamic screw dividing plate starts to rotate under the promotion of melt, and the viscous melt on the inwall of dynamic mixture pipeline is rotated
Dynamic screw dividing plate scrape, diluter melt among the viscous melt and dynamic mixture pipeline scraped mixes, and to
Before mixed in the 3rd semicircle helical duct and the 4th semicircle helical duct that are advanced in static batch mixing pipeline, after mixing again
Enter and above-mentioned mixing process is repeated in dynamic mixture pipeline.
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| CN111074374A (en) * | 2019-12-31 | 2020-04-28 | 吉林中粮生化有限公司 | Method for preparing high-quality polylactic acid fiber by continuous polymerization melt direct spinning |
| 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 |
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