CN110184663A - A kind of production method of PLA polylactic acid color silk fiber - Google Patents
A kind of production method of PLA polylactic acid color silk fiber Download PDFInfo
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- CN110184663A CN110184663A CN201910469497.4A CN201910469497A CN110184663A CN 110184663 A CN110184663 A CN 110184663A CN 201910469497 A CN201910469497 A CN 201910469497A CN 110184663 A CN110184663 A CN 110184663A
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- polylactic acid
- raw material
- drying
- color silk
- tow
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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
-
- 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
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- 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
- D01F1/04—Pigments
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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
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- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention relates to a kind of production methods of PLA polylactic acid color silk fiber.The production method includes: to provide polylactic acid raw material and polylactic acid Masterbatch, provided polylactic acid raw material and polylactic acid Masterbatch is dry, by after drying polylactic acid raw material and polylactic acid Masterbatch mix in proportion, form mixed raw material, mixed raw material is delivered in filament spinning component by screw extruder, polylactic acid raw material is melted through screw extruder to be compressed, and the mixed raw material of molten condition is formed, and the mixed raw material of molten condition sprays color silk tow through filament spinning component；Color silk tow passes sequentially through cross air blowing device, oiling device and path；The tow pulled out from path is stretched by drafting component；Tow after traction stretches enters after master network device adds nexus, is wound into spinning cake into up- coiler.The present invention is conducive to effective popularization of PLA polylactic acid color silk fiber.
Description
Technical field
The invention belongs to textile chemical fiber production technical field more particularly to a kind of producers of PLA polylactic acid color silk fiber
Method.
Background technique
Polylactic acid (full name in English: polylactic acid, abbreviation PLA) fiber, the raw material polylactic acid used is from plant
Object, non-fossil fuel, fiber has natural degradation, while having similar silky luster and feel, has certain water imbibition,
It is a kind of good fibrous material, development potentiality is huge.
In the prior art, the production method of color silk fiber is mainly made of stock-dye, and time-consuming for this method, loss
Height, and have pollution to environment, therefore, brought into schedule using polylactic acid manufacture colour combination silk fiber.
Currently, the technical method of domestic production polylactic acid color silk fiber is not very much, technical capability is also very limited, produces
Come polylactic acid color silk fiber it is second-rate, cause product it is effective promote form obstruction.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of production method of PLA polylactic acid color silk fiber,
In favor of effective popularization of polylactic acid color silk fiber.
The present invention through the following technical solutions to achieve the above objectives:
A kind of production method of PLA polylactic acid color silk fiber, the production method include:
Polylactic acid raw material and polylactic acid Masterbatch are provided；
Dry, the moisture content of the polylactic acid raw material after drying by provided polylactic acid raw material and polylactic acid Masterbatch
Less than 25ppm, the polylactic acid Masterbatch moisture content after drying is less than 35ppm；
By after drying polylactic acid raw material and polylactic acid Masterbatch mix in proportion, formed mixed raw material, the polylactic acid
The adding proportion of Masterbatch and the polylactic acid raw material is 0.2-5.0%；
The mixed raw material is delivered in filament spinning component by screw extruder, the polylactic acid raw material is through the screw rod
Extruder melting compression, forms the mixed raw material of molten condition, and the temperature of the screw extruder is controlled at 170 DEG C~230 DEG C；
The mixed raw material of the molten condition sprays color silk tow through the filament spinning component；
The color silk tow passes sequentially through cross air blowing device, oiling device and path, the blowing temperature of the cross air blowing device
Degree is 18 DEG C~22 DEG C；
The tow pulled out from the path is stretched by drafting component；
The tow after traction stretches enters after master network device adds nexus, is wound into spinning cake into up- coiler.
Preferably, the polylactic acid raw material be spinning-grade polylactic acid slice, average molecular weight 200000-300000 it
Between, fusing point is 175 DEG C.
Preferably, for the polylactic acid Masterbatch average molecular weight between 200000-300000, fusing point is 168-172 DEG C.
Further, described that provided polylactic acid raw material is dry, it specifically includes:
Provided polylactic acid raw material is dried by drying system, the drying system includes crystallizer and does
Dry tower, the crystallizer include shell, are provided with feed inlet at the top of the shell, the feed inlet be located at feed bin just under
It is square, it is provided with impurity removal port at the top of the shell side, the bottom of the shell is provided at least two air inlets；
Hot wind is introduced by least two air inlets, by the polylactic acid raw material fallen into from the feed inlet it is dry and
Pre-crystallized, after drying the same dust of hot wind, is discharged from impurity removal port；
The side of the drying tower is provided at least two air inlets, introduces dry air by least two air inlets,
The drying of the polylactic acid raw material after removing chalk dust removing will be dropped into drying tower.
Further, provided polylactic acid raw material is dry, further include:
The crystallization temperature of the crystallizer is 80 DEG C~110 DEG C, and the drying temperature of the drying tower is 80 DEG C~110 DEG C,
The drying time by provided polylactic acid raw material is 5~20 hours.
Further, provided polylactic acid Masterbatch is dry, it specifically includes:
By provided polylactic acid Masterbatch by the drying tower of blender, drying temperature is 80 DEG C~110 DEG C, when dry
Between be 10~20 hours.
Further, the polylactic acid raw material and polylactic acid Masterbatch by after drying mixes in proportion, and it is former to form mixing
Material, specifically includes:
By after drying polylactic acid raw material and polylactic acid Masterbatch enter in closed weighing type raw material add-on system together, shape
At mixed raw material.
Further, the mixed raw material of molten condition enters before filament spinning component, and the mixed raw material of molten condition also passes through
Fondant filter is filtered with the mixed raw material to molten condition, rejects undesirable mixed raw material, the melt mistake
The filtering accuracy of filter is in 20-30um.
Further, the mixed raw material of the molten condition passes through suction unit after the filament spinning component sprays tow
The polylactic acid raw material of not formed tow is siphoned away, suction unit setting the filament spinning component and the cross air blowing device it
Between.
Further, the tow pulled out from the path is stretched by drafting component, is specifically included:
The tow pulled out from the path successively pass through pre- Network device, first pair of hot-rolling group, second pair of hot-rolling group with
And tension adjustment draw-off godet, the heat roller temperature of first pair of hot-rolling group are 70 DEG C~100 DEG C, wrapping wire 4.5~6.5 encloses, roller group
Roughness is 1.5-2.0um, and the roller group temperature of second pair of hot-rolling group is 90 DEG C~120 DEG C, drafting multiple 1.3~2.5,
Wrapping wire 4.5~6.5 encloses, and roller group roughness is 2.5-3.5um, and the godet roughness of the tension adjustment draw-off godet is 2.5-
3.5um。
The beneficial effects of the present invention are:
The production method of a kind of PLA polylactic acid color silk fiber provided by the present invention, first by raw material drying, after drying
The moisture content of polylactic acid raw material be less than 25ppm, to prevent raw material pyrohydrolysis, meanwhile, it is dry after polylactic acid Masterbatch contain
Water rate is less than 35ppm, and when preventing itself and polylactic acid raw material mixing, excessively high moisture content makes polylactic acid raw material pyrohydrolysis；With
Polylactic acid raw material and lactic acid master batch after drying afterwards are mixed into mixed raw material in proportion, since polylactic acid Masterbatch and polylactic acid are former
The adding proportion of material is 0.2-5.0%, in this manner it is ensured that the colouring of subsequent tow is uniform and stable；Then, mixed raw material enters spiral shell
Bar extruder carries out melting compression, since the temperature of screw extruder is controlled at 170 DEG C~230 DEG C, to guarantee under melt state
Raw material it is uniform and stable；It melts compressed mixed raw material to enter in filament spinning component, tow, subsequent silk is sprayed by filament spinning component
Beam is cooled down through cross air blowing device, path and oiling device, since the blowing temperature control of cross air blowing device is 18 DEG C~22
DEG C, it is ensured that full and uniform cooling prevents from being quenched, and then tow is after drawing-off stretches, after adding nexus into master network device, then
Spinning cake is wound into up- coiler.
Color silk fiber manufactured by the production method of provided PLA polylactic acid color silk fiber through the invention, due to being
By forming polylactic acid raw material and polylactic acid Masterbatch co-production, it is made not by stock-dye, to solve existing
Having the production method that stock-dye is used in technology, time-consuming, it is high to be lost, and has the problem of pollution to environment, and be not easy to take off
Color, product quality is high, is conducive to effective popularization of PLA polylactic acid color silk fiber.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of the process units of PLA polylactic acid color silk fiber of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the drying system in Fig. 1；
Fig. 3 is the structural schematic diagram of the closed weighing type raw material add-on system in Fig. 1；
Fig. 4 is the structural schematic diagram of the cross air blowing device in Fig. 1；
Fig. 5 is the schematic side view of Fig. 4；
Fig. 6 is a kind of flow diagram of the production method of PLA polylactic acid color silk fiber of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Firstly, the embodiment of the invention discloses a kind of process units of PLA polylactic acid color silk fiber.
Fig. 1 is a kind of structural schematic diagram of the process units of PLA polylactic acid color silk fiber of the embodiment of the present invention, referring to figure
1, which includes the drying system 1, mixing unit 14, screw extruder 2, fondant filter set gradually by process flow
15, filament spinning component 3, suction unit 4, cross air blowing device 5, oiling device 6, path 7, drafting component, Network device 12 and winding
Machine 13.
Fig. 2 is the structural schematic diagram of the drying system of Fig. 1, and in conjunction with Fig. 2, the drying system 1 of the embodiment of the present invention includes knot
Brilliant device 1.1 and drying tower 1.2, wherein crystallizer 1.1 includes shell, is provided with feed inlet 1.11, feed inlet at the top of shell
1.11 are located at the underface of feed bin a, are provided with impurity removal port 1.12 at the top of shell side, the bottom of shell is provided at least two
Air inlet 1.13.
Polylactic acid raw material enters in crystallizer 1.1 from feed bin a, feed inlet 1.11, meanwhile, pass through at least two air inlets
1.13 are introduced into hot wind in crystallizer 1.1, and hot wind is by raw material drying, due to being the crystallizers for using double air inlets, mention
The heat of confession is more sufficient, to realize the crystallization of polylactic acid raw material；It, can will be in raw material meanwhile during hot wind is by dry feedstock
The light impurities such as the dust being mixed with are discharged from impurity removal port 1.12, to keep the purity of polylactic acid raw material.
In the embodiment of the present invention, hot wind can be introduced into crystallizer 1 by pressure fan and conveyance conduit.
Further, in conjunction with Fig. 2, the side of the drying tower 1.2 of the embodiment of the present invention is provided at least two air inlets
1.21, dry air is introduced by least two air inlets 1.21, the polylactic acid after removing chalk dust removing in drying tower will be dropped into
Raw material stoving.
Since the drying tower 1.2 in the embodiment of the present invention is also provided with two air inlets 1.21, can be conveyed by air pump
More dry airs, to make the more uniform stabilization of the drying effect of polylactic acid raw material.
In conjunction with Fig. 1, the drying system 1 of the embodiment of the present invention further includes to polylactic acid Masterbatch drying tower 1.3, to poly- cream
Sour Masterbatch raw material is dried, and the polylactic acid Masterbatch drying tower 1.3 of the embodiment of the present invention is the drying tower for having belt stirrer,
It is stirred when to polylactic acid Masterbatch raw material drying, guarantees drying effect.
In the embodiment of the present invention, mixing unit 14 is the device mixed to polylactic acid raw material and polylactic acid Masterbatch raw material
The mixing unit of part, the embodiment of the present invention can be carried out using closed weighing type raw material add-on system.
Fig. 3 is the structural schematic diagram of the closed weighing type raw material add-on system in Fig. 1, and in conjunction with Fig. 3, the closed weighing type is former
Material add-on system includes mixer 14.1, the first feed pipe 14.2 and the second feed pipe 14.3, the first feed pipe 14.2 and
Second feed pipe 14.3 is oppositely arranged on the top of mixer 14.1, and the first feed pipe 14.2 is used for being connected to drying tower 1.2
It is transported in mixer 14.1 in by the polylactic acid raw material after drying, is provided with controlled first on the first feed pipe 14.2
Butterfly valve 14.4, for controlling the on-off of the first feed pipe 14.2；And the second feed pipe 14.3 is used for and polylactic acid Masterbatch is dry
Tower 1.3 is connected to, and is transported in mixer 14.1 for the polylactic acid Masterbatch after drying, equally, in the second feed pipe 14.3
On be provided with controlled second butterfly valve 14.5, for controlling the conveying of the second feed pipe 14.3.
The mixer 14.1 of the embodiment of the present invention is continuous blanking mixed method, will go into the poly- cream in mixer 14.1
Acid starting material and polylactic acid Masterbatch are mixed by setting ratio.
The bimetallic that the screw extruder 2 of the embodiment of the present invention can select the roasting of novel alloy covered type to penetrate technical treatment is special
With screw extruder, band pin mixing refining head, draw ratio 25 in this way can be with one area's feed end of screw rod to six area's discharge ends
Guarantee that melt is uniform and stable.
The fondant filter 15 of the embodiment of the present invention mainly filters out possible in polylactic acid raw material and polylactic acid Masterbatch
Impurity can also improve spinning quality to improve metering pump service life and the element period of filament spinning component.The melt of the embodiment of the present invention
The filtering accuracy of filter is 20-30um.
In the embodiment of the present invention, the plate diameter of the spinneret of filament spinning component 3 is 70~105mm, and spinneret micropore section is circle
Shape or abnormity, wherein special-shaped micropore draw ratio is 2-3 times.
Further, in the embodiment of the present invention, heat medium system is done using 200 DEG C of boiling point or so of low temperature Biphenyl Ether, is controlled
Temperature is 200~230 DEG C, and heat medium system is to fondant filter, the pipeline heating of filament spinning component, in the actual use process,
Heating agent need to recycle sufficiently, and ensure homogeneous heating.
The lower section of filament spinning component 3 is arranged in the suction unit 4 of the embodiment of the present invention, for spinning monomer to be siphoned away, in order to avoid
The progress of subsequent technique is influenced, and guarantees the quality of tow.
The suction unit 4 of the embodiment of the present invention can use recirculated water negative-pressure ward, sufficiently to extract monomer out.
Fig. 4 is the structural schematic diagram of the cross air blowing device in Fig. 1, and Fig. 5 is the schematic side view of Fig. 4, in conjunction with Fig. 4 and Fig. 5,
The cross air blowing device 5 of the embodiment of the present invention includes blowing cabinet 5.1, air inlet cylinder 5.2, is provided at the top of cabinet 5.1 of drying multiple
The spinneret orifice of harness cord hole, the harness cord hole and filament spinning component is arranged in a one-to-one correspondence, blowing 5.1 bottom of cabinet be provided with hole and
The horizontal side of through hole is arranged in wind net 5.3, wind net 5.3, and the lower section of wind net 5.3, multiple harness cord holes are arranged in air inlet cylinder 5.2
And through hole is located on same vertical direction.
In use, the tow that the spinneret orifice in filament spinning component sprays is by corresponding harness cord hole, and it is introduced into blowing cabinet
It is interior, then drawn from through hole, meanwhile, the air inlet cylinder that the output section of blowing device is connected introduces cooling wind, and then will be by blowing
The tow of wind box cools down.
The blowing device of the embodiment of the present invention can for hair dryer etc., the embodiment of the present invention to the type of blowing device herein
With no restrictions.
In conjunction with Fig. 4, in the embodiment of the present invention, suction unit 4 may include suction tube, and one end of the suction tube is located at blowing
In cabinet 5.1, suction tube it is open at one end, the other end of suction tube is located at outside blowing cabinet 5.1, and then by not formed tow
Polylactic acid monomer from open end siphon away to blowing 5.1 collected outside of cabinet.
In conjunction with Fig. 4 and Fig. 5, the blowing cabinet 5.1 of the embodiment of the present invention has the first side wall 5.11, and the first side wall 5.11 leans on
Nearly wind net 5.3, the first side wall 5.11 and the setting at an acute angle of wind net 5.3, can make the first side wall 5.11 form guide plate in this way, with
Cooling wind is more efficiently introduced, realizes the rapid cooling of tow.
In conjunction with Fig. 4 and Fig. 5, filter layer 5.4, filter layer are vertically provided in the blowing cabinet 5.1 of the embodiment of the present invention
5.4 top and bottom are connected on the top and wind net 5.3 of side wall 5.11, filter layer can to direct and tow into
The cooling wind of row heat exchange is filtered, and is avoided having and is wound impurity on the tow of the condition of high temperature, and the quality of tow is influenced.
In the embodiment of the present invention, filter layer 5.4 is arranged in pluggablely in air inlet box body 5.1, not only can into
Enter the intracorporal cooling wind filtering of blow box, guarantees the quality of production of tow, dismounting cleaning periodically can also be carried out to filter screen, protect
Card cooling wind passes through.
Further, the filter layer 5.4 of the embodiment of the present invention can be porous from what is horizontally set gradually into cabinet
Filter plate, filter screen and cellular board are combined into, in this way can be from outside to inside to different size of contaminant filter.
Further, in conjunction with Fig. 4 and Fig. 5, the blowing cabinet 5.1 of the embodiment of the present invention has second sidewall 5.12, this
Two side walls 5.12 and the first side wall 5.11 are oppositely arranged, and two fans are provided in second sidewall 5.12 relatively and openable door
5.13, box house can not only be observed, and when phenomena such as tow knotting occurs in the inside of cabinet, it can be to tow
It is operated.
The cooling effect of tow not only can be improved due to being to cool down using air cooling way to tow in the embodiment of the present invention
Fruit can also improve the spinning speed of equipment, improve the yield of finished fiber tow.
Further, in conjunction with Fig. 4, in the embodiment of the present invention, blowing cabinet 5.1 is being with the corresponding height of filter layer 5.4
Blowing area, height is 1500~2200mm, and D type outlet air curve prevents from being quenched to guarantee full and uniform cooling, and is dried
The corresponding height below spinning manifold of cabinet 5.1 is zone of silence, and height is 90~130mm, this is because zone of silence height
It will have a direct impact on tow quality, the setting of zone of silence height of the embodiment of the present invention can drop too fast to avoid at a temperature of, cause silk
Ropy phenomenon.
Further, the oiling device 6 in the embodiment of the present invention is oil nozzle oil feeding system, uses anti-splashing, low friction, resistance to
Mill oil nozzle oils, this batten is dry to be stablized, and guarantees dyeing uniformity.
Path 7 is the channel that tow passes through naturally in the embodiment of the present invention, for making the tow after oiling oil sufficiently, and
It prevents from fading, length can according to need specific setting.
In conjunction with Fig. 1, in the embodiment of the present invention, in conjunction with Fig. 1, in the embodiment of the present invention, drafting component includes pressing process flow
8, first pairs of the pre- Network device set gradually, 9, second pairs of hot-rolling group hot-rolling group 10 and tension adjustment draw-off godet 11.
After the tow of the embodiment of the present invention passes through path 7, it is introduced into pre- Network device 8, tow can be made to knot in this way, into one
Step reduces end breakage rate.
In the prior art, each pair of draw roll in drafting component, usually chilling roller and hot-rolling are collocated with each other use, make in this way
At, uneven heating insufficient to the tensioning of fibre bundle, the physical property of fibre bundle is caused to differ larger, breaking strength
It is low, it is not able to satisfy the requirement of later process, the embodiment of the present invention improves this.
In the embodiment of the present invention, first pair of hot-rolling group 9 and second pair of hot-rolling group 10 are made of two hot-rollings, so as to
It is stabilized fibre bundle elongation and internal structure, its internal drafting stress is effectively eliminated, improves fibre bundle
Shape stability, and the breaking strength of fibre bundle is improved, reduce the end breakage rate of fibre bundle.
Tow enters the networking of master network device 12, then, is wound into spinning cake by up- coiler 13 after drafting component.
The 13 traversing mode of up- coiler of the embodiment of the present invention is precise winding mode, and up- coiler speed is 2500~3500m/min.
In addition, the process units based on above-mentioned PLA polylactic acid color silk fiber, the embodiment of the invention also provides the poly- creams of PLA
The production method of sour color silk fiber.
Fig. 6 is a kind of flow diagram of the production method of PLA polylactic acid color silk fiber of the embodiment of the present invention, in conjunction with figure
6, which includes:
S1: polylactic acid raw material and polylactic acid Masterbatch are provided；
S2: provided polylactic acid raw material and polylactic acid Masterbatch is dry；
S3: by after drying polylactic acid raw material and polylactic acid Masterbatch mix in proportion, formed mixed raw material；
S4: the mixed raw material is delivered in filament spinning component by screw extruder；
S5: the mixed raw material of molten condition sprays color silk tow through filament spinning component；
S6: color silk tow passes sequentially through cross air blowing device, oiling device and path；
S7: the tow pulled out from the path is stretched by drafting component；
S8: the tow after traction stretches enters after master network device adds nexus, is wound into spinning cake into up- coiler.
The S1 of the embodiment of the present invention is specifically included:
The polylactic acid raw material of the embodiment of the present invention is preferably spinning-grade PLA polylactic acid slice, average molecular weight 200000
~300000,175 DEG C of fusing point, and polylactic acid Masterbatch average molecular weight is between 200000-300000, fusing point 168-172
℃.The polylactic acid raw material for providing high quality is to guarantee that spinning is smoothly crucial, has the polylactic acid slice of above-mentioned characteristic and gathers
Lactic acid Masterbatch can guarantee that spinning is smooth.
The S2 of the embodiment of the present invention is specifically included:
Due to polylactic acid easily pyrohydrolysis, it is necessary to strict control moisture content, drying system through the embodiment of the present invention
Afterwards, need to by the moisture control of polylactic acid raw material in 25ppm hereinafter, to prevent raw water solution, cause spinning quality to decline.
Since polylactic acid thermal stability is poor, the excessively high influence spinnability of drying temperature, therefore, through the embodiment of the present invention dry
When drying system, crystallization temperature is controlled between 85 DEG C~105 DEG C, and drying temperature controls between 85 DEG C~105 DEG C, dry 5~
20 hours.The quality of polylactic acid raw material after drying is stablized, and just can guarantee that spinning is gone on smoothly.
And 80 DEG C~110 DEG C of drying temperature when the drying of polylactic acid master batch, it is 10~20 hours dry, so that poly- after dry
Lactic acid master batch moisture content is less than 35ppm.
The S3 of the embodiment of the present invention is specifically included:
Polylactic acid raw material and polylactic acid Masterbatch after drying enter closed weighing type raw material add-on system, polylactic acid together
The adding proportion 0.2-5.0% of Masterbatch and polylactic acid raw material, so that the color silk fiber colouring produced is uniform and stable.
The S4 of the embodiment of the present invention is specifically included:
One area's feed end of screw rod of the screw extruder of the embodiment of the present invention to six area's discharge end temperature control 170 DEG C~
Between 230 DEG C, to guarantee that melt is uniform and stable.
Mixed raw material through screw extruder conveying is before entering filament spinning component, it is also necessary to by fondant filter,
It is filtered with the mixed raw material to molten condition, rejects undesirable mixed raw material.
The S5 of the embodiment of the present invention is specifically included:
Since the polylactic acid raw material stability under molten condition is poor, the digit of every line of filament spinning component, head number are set
Meter, it is necessary to strict control melt residence time < 20min.If the residence time is too long, degradation is seriously unfavorable for spinning production, finished product
Silk poor quality.
In the embodiment of the present invention, the heat medium pipe of filament spinning component does heating agent using 200 DEG C of boiling point or so of low temperature Biphenyl Ether, controls
200~230 DEG C of temperature processed, and keep heating agent circulation abundant, it is ensured that homogeneous heating.
The S6 of the embodiment of the present invention is specifically included:
The cross air blowing device of the embodiment of the present invention is blown using D type outlet air curve, and supply air temperature is 18~22 DEG C,
To guarantee full and uniform cooling, prevent from being quenched.
The S7 of the embodiment of the present invention is specifically included:
The tow pulled out from path successively by pre- Network device, first pair of hot-rolling group, second pair of hot-rolling group and is opened
Power adjusts draw-off godet, and the heat roller temperature of first pair of hot-rolling group is 70 DEG C~100 DEG C, and wrapping wire 4.5~6.5 encloses, and roller group roughness is
1.5-2.0um, the roller group temperature of second pair of hot-rolling group are 90 DEG C~120 DEG C, drafting multiple 1.3~2.5, wrapping wire 4.5~6.5
Circle, roller group roughness are 2.5-3.5um, and the godet roughness of tension adjustment draw-off godet is 2.5-3.5um.
The S8 of the embodiment of the present invention is specifically included:
Tow enters the networking of master network device, and up- coiler speed is 2500~3500m/min.
Concrete application:
Using above-mentioned process units and production method, prepares 83dtex/72fPLA polylactic acid and perspire emulation silk fiber.It is used
The molecular weight 220000 of polylactic acid raw material, fusing point are 175 DEG C, and moisture content 20ppm, PLA polylactic acid blue master batch molecular weight is
200000, fusing point is 170 DEG C, moisture content 30ppm, adding proportion 0.9%；Using 95 screw rod of Φ, every line (every screw rod) 2,
Ten every, draw ratio 25, point five Qu Jiare, each area's temperature is respectively as follows: 188 DEG C of area's temperature, two 208 DEG C of area's temperature, and three
218 DEG C of area's temperature, four 223 DEG C of area's temperature, five 225 DEG C of area's temperature；223 DEG C of condition of spinning manifold temperature, the zone of silence of cross air blowing device is high
110mm is spent, dry height 1600mm, and 20 DEG C of wind-warm syndrome, wind speed 0.41m/s, spinneret specification is Φ 95, micropore section circle, and the
A pair of of 78 DEG C of hot-rolling group temperature, 100 DEG C of the temperature of second pair of hot-rolling group, draw ratio 1.8, winding speed 3500m/min, spinning
Finished silk breaking strength >=3.7cN/dtex of system, extension at break 30%, oil content 1.11%.
In conclusion color silk manufactured by the production method of PLA polylactic acid color silk fiber provided by through the invention is fine
Dimension, polylactic acid raw material and polylactic acid Masterbatch co-production are formed, be made not by stock-dye by then passing through, from
And solve the problem of that time-consuming, loss is high and has pollution to environment using the production method of stock-dye in the prior art, and
Fugitive color is not allowed, product quality is high, is conducive to effective popularization of PLA polylactic acid color silk fiber.
Following illustrated embodiment is better embodiment of the invention, only is used to facilitate to illustrate the present invention, not to this hair
The bright limitation made under any form has usually intellectual in any technical field, if not departing from the proposed skill of the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from technical feature content of the invention, in the range of still falling within the technology of the present invention feature.
Claims (10)
1. a kind of production method of PLA polylactic acid color silk fiber, which is characterized in that the production method includes:
Polylactic acid raw material and polylactic acid Masterbatch are provided；
Provided polylactic acid raw material and polylactic acid Masterbatch is dry, and the moisture content of the polylactic acid raw material after drying is less than
25ppm, the polylactic acid Masterbatch moisture content after drying are less than 35ppm；
By after drying polylactic acid raw material and polylactic acid Masterbatch mix in proportion, formed mixed raw material, the polylactic acid color masterbatch
The adding proportion of grain and the polylactic acid raw material is 0.2-5.0%；
The mixed raw material is delivered in filament spinning component by screw extruder, the polylactic acid raw material is through the screw extruding
Machine melting compression, forms the mixed raw material of molten condition, and the temperature of the screw extruder is controlled at 170 DEG C~230 DEG C；
The mixed raw material of the molten condition sprays color silk tow through the filament spinning component；
The color silk tow passes sequentially through cross air blowing device, oiling device and path, and the blowing temperature of the cross air blowing device is
18 DEG C~22 DEG C；
The tow pulled out from the path is stretched by drafting component；
The tow after traction stretches enters after master network device adds nexus, is wound into spinning cake into up- coiler.
2. a kind of production method of PLA polylactic acid color silk fiber according to claim 1, which is characterized in that the poly- cream
Acid starting material is spinning-grade polylactic acid slice, and for average molecular weight between 200000-300000, fusing point is 175 DEG C.
3. a kind of production method of PLA polylactic acid color silk fiber according to claim 1, which is characterized in that the poly- cream
For sour Masterbatch average molecular weight between 200000-300000, fusing point is 168-172 DEG C.
4. a kind of production method of PLA polylactic acid color silk fiber according to claim 1, which is characterized in that described by institute
The polylactic acid raw material of offer is dry, specifically includes:
Provided polylactic acid raw material is dried by drying system, the drying system includes crystallizer and drying
Tower, the crystallizer include shell, and feed inlet is provided at the top of the shell, and the feed inlet is located at the underface of feed bin,
Impurity removal port is provided at the top of the shell side, the bottom of the shell is provided at least two air inlets；
Hot wind is introduced by least two air inlets, by the polylactic acid raw material fallen into from the feed inlet drying and pre- knot
Crystalline substance, the same dust of hot wind after drying, is discharged from impurity removal port；
The side of the drying tower is provided at least two air inlets, introduces dry air by least two air inlets, will
The drying of polylactic acid raw material after removing chalk dust removing is dropped into drying tower.
5. a kind of production method of PLA polylactic acid color silk fiber according to claim 4, which is characterized in that will be provided
Polylactic acid raw material it is dry, further include:
The crystallization temperature of the crystallizer is 80 DEG C~110 DEG C, and the drying temperature of the drying tower is 80 DEG C~110 DEG C, described
It is 5~20 hours by the drying time of provided polylactic acid raw material.
6. a kind of production method of PLA polylactic acid color silk fiber according to claim 1, which is characterized in that will be provided
Polylactic acid Masterbatch it is dry, specifically include:
By provided polylactic acid Masterbatch by the drying tower of blender, drying temperature is 80 DEG C~110 DEG C, and drying time is
10~20 hours.
7. a kind of production method of PLA polylactic acid color silk fiber according to claim 1, which is characterized in that described to do
Polylactic acid raw material and polylactic acid Masterbatch after dry mix in proportion, form mixed raw material, specifically include:
By after drying polylactic acid raw material and polylactic acid Masterbatch enter in closed weighing type raw material add-on system together, formed mixed
Close raw material.
8. a kind of production method of PLA polylactic acid color silk fiber according to claim 7, which is characterized in that molten condition
Mixed raw material enter before filament spinning component, the mixed raw material of molten condition also passes through fondant filter, to molten condition
Mixed raw material is filtered, and rejects undesirable mixed raw material, the filtering accuracy of the fondant filter is in 20-30um.
9. a kind of production method of PLA polylactic acid color silk fiber according to claim 8, which is characterized in that the melting
The mixed raw material of state is siphoned away spinning monomer by suction unit after the filament spinning component sprays tow, the suction dress
It installs between the filament spinning component and the cross air blowing device.
10. a kind of production method of PLA polylactic acid color silk fiber according to claim 1, which is characterized in that described from institute
It states the tow that path pulls out to stretch by drafting component, specifically include:
The tow pulled out from the path successively by pre- Network device, first pair of hot-rolling group, second pair of hot-rolling group and is opened
Power adjusts draw-off godet, and the heat roller temperature of first pair of hot-rolling group is 70 DEG C~100 DEG C, and wrapping wire 4.5~6.5 encloses, and roller group is coarse
Degree is 1.5-2.0um, and the roller group temperature of second pair of hot-rolling group is 90 DEG C~120 DEG C, and drafting multiple is 1.3~2.5, wrapping wire
4.5~6.5 circles, roller group roughness are 2.5-3.5um, and the drafting multiple of the tension adjustment draw-off godet is 0.95~1.0 godet
Roughness is 2.5-3.5um.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922613A (en) * | 2019-11-29 | 2020-03-27 | 安徽丰原福泰来聚乳酸有限公司 | Colored polylactic acid particles and preparation method thereof |
| CN111321482A (en) * | 2020-02-28 | 2020-06-23 | 青岛叒米科技有限公司 | Production process and device of colored polylactic acid filament yarn |
| CN113564736A (en) * | 2021-07-27 | 2021-10-29 | 张家港锦亿化纤有限公司 | Chemical fiber monofilament production process for optimizing fiber performance |
| CN114592253A (en) * | 2022-02-11 | 2022-06-07 | 安徽丰原生物纤维股份有限公司 | Polylactic acid filament and preparation method thereof |
| CN115948815A (en) * | 2022-11-18 | 2023-04-11 | 湖北博韬合纤有限公司 | Preparation method of PLA degradable short fibers |
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2019
- 2019-05-27 CN CN201910469497.4A patent/CN110184663A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922613A (en) * | 2019-11-29 | 2020-03-27 | 安徽丰原福泰来聚乳酸有限公司 | Colored polylactic acid particles and preparation method thereof |
| CN111321482A (en) * | 2020-02-28 | 2020-06-23 | 青岛叒米科技有限公司 | Production process and device of colored polylactic acid filament yarn |
| CN113564736A (en) * | 2021-07-27 | 2021-10-29 | 张家港锦亿化纤有限公司 | Chemical fiber monofilament production process for optimizing fiber performance |
| CN114592253A (en) * | 2022-02-11 | 2022-06-07 | 安徽丰原生物纤维股份有限公司 | Polylactic acid filament and preparation method thereof |
| CN114592253B (en) * | 2022-02-11 | 2024-02-23 | 安徽丰原生物纤维股份有限公司 | Polylactic acid filament yarn and preparation method thereof |
| CN115948815A (en) * | 2022-11-18 | 2023-04-11 | 湖北博韬合纤有限公司 | Preparation method of PLA degradable short fibers |
| CN115948815B (en) * | 2022-11-18 | 2023-07-21 | 湖北博韬合纤有限公司 | Preparation method of PLA degradable short fiber |
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