CN110172743A - A kind of PLA polylactic acid perspires the production method of emulation silk fiber - Google Patents
A kind of PLA polylactic acid perspires the production method of emulation silk fiber Download PDFInfo
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- CN110172743A CN110172743A CN201910445861.3A CN201910445861A CN110172743A CN 110172743 A CN110172743 A CN 110172743A CN 201910445861 A CN201910445861 A CN 201910445861A CN 110172743 A CN110172743 A CN 110172743A
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- polylactic acid
- raw material
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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
- 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
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
-
- 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
- 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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The present invention relates to the production methods that a kind of PLA polylactic acid perspires emulation silk fiber.The production method includes: first that polylactic acid raw material is dry；Polylactic acid raw material after being subsequently dried enters screw extruder and carries out melting compression, compressed polylactic acid raw material is melted to enter in filament spinning component, tow is sprayed by filament spinning component, tow is cooled down through cross air blowing device, oiling device and path, then tow draws through drafting component and stretches, tow after drawing-off stretches enters after master network device adds nexus, is wound into spinning cake into up- coiler.The present invention is conducive to effective popularization that PLA polylactic acid perspires emulation silk fiber.
Description
Technical field
The invention belongs to textile chemical fiber production technical fields more particularly to a kind of PLA polylactic acid to perspire emulation silk fiber
Production 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 for perspiring emulation silk fiber is mainly prepared with fibre-forming polymer.However, this
Emulation silk fiber is perspired made of kind material to be difficult to degrade in the soil, once arbitrarily abandoning, be easy to cause the pollution of environment, because
This, perspires emulation silk fiber using polylactic acid manufacture and brings into schedule.
Currently, the technical method that domestic production polylactic acid perspires emulation silk fiber is not much that technical capability is also very limited,
The polylactic acid produced perspires the second-rate of emulation silk fiber, and effective popularization of product is caused to form obstruction.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides the lifes that a kind of PLA polylactic acid perspires emulation silk fiber
Production method, to solve the problems, such as environmental pollution caused by wool-like fiber is prepared as fibre-forming polymer in the prior art, in favor of poly-
Lactic acid perspires effective popularization of emulation silk fiber.
The present invention through the following technical solutions to achieve the above objectives:
A kind of PLA polylactic acid perspires the production method of emulation silk fiber, and the production method includes:
Polylactic acid raw material is provided；
Provided polylactic acid raw material is dry, and the moisture content of the polylactic acid raw material after drying is less than 25ppm；
Polylactic acid raw material after drying is delivered in filament spinning component by screw extruder, the polylactic acid raw material is through institute
Screw extruder melting compression is stated, the polylactic acid raw material of molten condition is formed, the temperature of the screw extruder is controlled at 170 DEG C
~230 DEG C；
The polylactic acid raw material of the molten condition sprays tow through the filament spinning component, and the spinneret orifice of the filament spinning component exists
Section on wire vent direction is "+" type, " * " type or " rice " type, and the spinneret orifice length-width ratio is 5~10；
The 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.
Further, the polylactic acid raw material be spinning-grade polylactic acid slice, average molecular weight 200000-300000 it
Between, fusing point is 173~178 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, the molten condition polylactic acid raw material passes through suction unit after the filament spinning component sprays tow
Spinning monomer is siphoned away, the suction unit is arranged between the filament spinning component and the cross air blowing device.
Further, the cross air blowing device includes blowing cabinet, air inlet cylinder, and the blowing top of the box is provided with multiple
Harness cord hole, the blowing bottom of box are provided with hole and wind net, and the level one of the through hole is arranged in the wind net
The lower section of the wind net is arranged in side, the air inlet cylinder；
Multiple harness cord holes and the through hole are located on same vertical direction.
Further, the blowing cabinet has the first side wall, and the first side wall is close to the wind net, first side
Wall and the wind net setting at an acute angle.
Further, filter layer, the top and bottom point of the filter screen are vertically provided in the blow box body
Top and the wind for not being connected to the first side wall are online.
Further, the blowing cabinet also has second sidewall, and the second sidewall and the first side wall are set relatively
It sets, two fans is provided in the second sidewall relatively and openable door.
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, described
The roller group temperature of second pair of hot-rolling group is 90 DEG C~110 DEG C, and drafting multiple is 1.3~1.8, and wrapping wire 4.5~6.5 encloses, described
The drafting multiple that power adjusts draw-off godet is 0.95~1.0.
The beneficial effects of the present invention are:
A kind of PLA polylactic acid provided by the present invention perspires the production method of emulation silk fiber, first does polylactic acid raw material
It is dry, since the moisture content of the polylactic acid raw material after drying is less than 25ppm, to prevent raw material pyrohydrolysis；It is poly- after being subsequently dried
Lactic raw material enters screw extruder and carries out melting compression, since the temperature control of screw extruder is at 170 DEG C~230 DEG C, with
Guarantee that the raw material under melt state is uniform and stable；It melts compressed polylactic acid raw material to enter in filament spinning component, passes through spinning group
Part sprays tow, and subsequent tow is cooled down through cross air blowing device, path and oiling device, due to the blowing temperature of cross air blowing device
Degree control 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, into major network
After network device, enters back into up- coiler and be wound into spinning cake.
Due to filament spinning component of the invention spinneret orifice wire vent direction section be "+" type, " * " type or " rice " type, and
Spinneret orifice length-width ratio is 5~10, and every side radian in the tow section of the spinneret orifice production in this section is larger, it is ensured that inhales well
It is wet, perspire effect；And since the material of the wool-like fiber is polylactic acid, there is natural degradation, not by poly- at fibre
Object preparation is closed, do not can cause environmental pollution, to solve dirty using environment caused by fibre-forming polymer in the prior art
The problem of dye, to be conducive to effective popularization of PLA polylactic acid wool-like 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 the structural schematic diagram for the process units that a kind of PLA polylactic acid of the embodiment of the present invention perspires emulation silk fiber；
Fig. 2 is the structural schematic diagram of the drying system of Fig. 1；
Fig. 3 is that the section of the spinneret orifice of the spinning plate of the embodiment of the present invention is the structural schematic diagram of "+" type；
Fig. 4 is that the section of the spinneret orifice of the spinning plate of the embodiment of the present invention is the structural schematic diagram of " * " type；
Fig. 5 is that the section of the spinneret orifice of the spinning plate of the embodiment of the present invention is the structural schematic diagram of " rice " type；
Fig. 6 is the schematic cross-section of the tow of spinneret orifice shown in Fig. 3；
Fig. 7 is the schematic cross-section of the tow of spinneret orifice shown in Fig. 4；
Fig. 8 is the schematic cross-section of the tow of spinneret orifice shown in fig. 5；
Fig. 9 is the structural schematic diagram of the cross air blowing device in Fig. 1；
Figure 10 is the schematic side view of Fig. 9；
Figure 11 is the process signal for the production method that a kind of PLA polylactic acid of the embodiment of the present invention perspires emulation silk fiber
Figure.
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 the process units that a kind of PLA polylactic acid perspires emulation silk fiber.
Fig. 1 is the structural schematic diagram for the process units that a kind of PLA polylactic acid of the embodiment of the present invention perspires emulation silk fiber,
Referring to Fig. 1, which includes the drying system 1 set gradually by process flow, screw extruder 2, filament spinning component 3, suction dress
Set 4, cross air blowing device 5, oiling device 6, path 7, drafting component, Network device 12 and up- coiler 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, by least two into
Hot wind is introduced into crystallizer 1.1 by air port 1.13, and hot wind is by raw material drying, due to being the crystallizers for using double air inlets,
The heat of offer is more sufficient, to realize the crystallization of polylactic acid raw material；It, can be by raw material meanwhile during hot wind is by dry feedstock
In the light impurities such as the dust that is mixed be 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 the embodiment of the present invention, screw extruder 2 can select novel alloy covered type to roast the bimetallic for penetrating technical treatment
Bolt special extruder, band pin mixing refining head, draw ratio 25 in this way may be used with one area's feed end of screw rod to six area's discharge ends
To guarantee that melt is uniform and stable.
In the embodiment of the present invention, the plate diameter of the spinneret of filament spinning component 3 is 70~95mm, the section of the spinneret orifice of spinning plate
For "+" type (shown in Fig. 3), " * " type (shown in Fig. 4) or " rice " type (shown in Fig. 5), and the endpoint of spinneret orifice is to the spinneret orifice
The length-width ratio in the aperture at center is greater than 5, that is, the length-width ratio for arriving each "-" at the center of spinneret orifice is greater than 5, can make to give birth in this way
The every side radian in the section correspondence tow (Fig. 6, Fig. 7 and Fig. 8) of production is larger, it is ensured that moisture absorption perspires effect.
Further, in the embodiment of the present invention, filament spinning component does heating agent system using 200 DEG C of boiling point or so of low temperature Biphenyl Ether
System, controlled at 200~230 DEG C.Heat medium system is heated to manifold and extruder head, and such heating agent circulation is abundant, it is ensured that adds
It is hot uniform.
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. 9 is the structural schematic diagram of the cross air blowing device in Fig. 1, and Figure 10 is the schematic side view of Fig. 9, in conjunction with Fig. 9 and figure
10, 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 more
The spinneret orifice of a 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 with
And the horizontal side of through hole is arranged in wind net 5.3, wind net 5.3, the lower section of wind net 5.3, multiple harness cords are arranged in air inlet cylinder 5.2
Hole and through hole are 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.
In conjunction with Fig. 9, 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, so by spinning monomer from
Open end is siphoned away to blowing 5.1 collected outside of cabinet.
In conjunction with Fig. 9 and Figure 10, the blowing cabinet 5.1 of the embodiment of the present invention has the first side wall 5.11, the first side wall 5.11
Close to 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,
More efficiently to introduce cooling wind, the rapid cooling of tow is realized.
In conjunction with Fig. 9 and Figure 10, 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. 9 and Figure 10, 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. 9, 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 1500~2000mm, 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.
Further, the channel that path 7 passes through naturally in the embodiment of the present invention for tow, for making the tow after oiling
It is oily abundant, and prevent 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 is made of one sub-wire roller of a hot-rolling, second pair of hot-rolling group 10
Be made of two hot-rollings, so as to so that fibre bundle elongation and internal structure be stabilized, effectively eliminate inside it
Drafting stress, improve the shape stability of fibre bundle, and improve the breaking strength of fibre bundle, reduce fibre bundle
End breakage rate.
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 accurate anti-stacked mode, can fully ensure that spinning cake shaping is good, general 8~
12, to guarantee that enough production capacities, up- coiler speed are 2500~3500m/min.
In addition, the process units of emulation silk fiber is perspired based on above-mentioned PLA polylactic acid, the embodiment of the invention also provides
PLA polylactic acid perspires the production method of emulation silk fiber.
Figure 11 is the process signal for the production method that a kind of PLA polylactic acid of the embodiment of the present invention perspires emulation silk fiber
Figure, in conjunction with Figure 11, which includes:
S1: polylactic acid raw material is provided；
S2: provided polylactic acid raw material is dry；
S3: the polylactic acid raw material after drying is delivered in filament spinning component by screw extruder, polylactic acid raw material is through spiral shell
The melting compression of bar extruder, forms the polylactic acid raw material of molten condition；
S4: the polylactic acid raw material of molten condition sprays tow through filament spinning component；
S5: tow passes sequentially through cross air blowing device, oiling device and path；
S6: the tow pulled out from path is stretched by drafting component；
S7: 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
~300000,173-178 DEG C of fusing point, the polylactic acid raw material for providing high quality is to guarantee that spinning is smoothly crucial, has above-mentioned spy
Property polylactic acid slice i.e. can guarantee spinning it 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 80 DEG C~110 DEG C, and drying temperature controls between 80 DEG C~110 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.
The S3 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.
The S4 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 S5 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 S6 of the embodiment of the present invention is specifically included:
The drafting component of the embodiment of the present invention uses a step drawing-off, and the heat roller temperature of first pair of hot-rolling group is 70 DEG C~100
DEG C, wrapping wire 4.5~6.5 encloses, and the roller group temperature of second pair of hot-rolling group is 90 DEG C~120 DEG C, and drafting multiple is 1.3~1.8, around
Silk 4.5~6.5 encloses, and since polylactic acid fusing point is low, thermostabilization is poor, and setting temperature is no more than 130 DEG C.
When tow enters tension adjustment draw-off godet, drafting multiple is 0.95~1.0.
The S7 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 one:
Using above-mentioned process units and production method, prepares 50dtex/48fPLA polylactic acid and perspire emulation silk fiber.It is used
PLA polylactic acid slice molecular weight 210000, fusing point are 175 DEG C, the aqueous 20ppm of dry chip；Using 95 screw rod of Φ, every line is (every
Screw rod) 3, ten every, draw ratio 25, point five Qu Jiare, each area's temperature is respectively as follows: 178 DEG C of area's temperature, two area's temperature
198 DEG C, three 208 DEG C of area's temperature, four 218 DEG C of area's temperature, five 228 DEG C of area's temperature；225 DEG C of condition of spinning manifold temperature.Zone of silence height
100mm.Cooling device cross air blasting height 1500mm, 21 DEG C of wind-warm syndrome, wind speed 0.35m/s.Spinneret specification is Φ 85, and thread eye is cut
Face is "+", 75 DEG C of the temperature of first pair of hot-rolling group, 102 DEG C of the temperature of second pair of hot-rolling group, draw ratio 1.4, winding speed
3300m/min.Finished silk breaking strength >=3.8cN/dtex of spinning, extension at break 29%, oil content 1.05%.
It is specific to use two:
Using above-mentioned process units and production method, prepares 30dtex/24fPLA polylactic acid and perspire emulation silk fiber.It is used
PLA polylactic acid slice molecular weight 210000, fusing point are 175 DEG C, the aqueous 18ppm of dry chip；Using 95 screw rod of Φ, every line is (every
Screw rod) 3, ten every, draw ratio 25, point five Qu Jiare, each area's temperature is respectively as follows: 180 DEG C of area's temperature, two area's temperature
200 DEG C, three 210 DEG C of area's temperature, four 220 DEG C of area's temperature, five 228 DEG C of area's temperature；230 DEG C of condition of spinning manifold temperature.Zone of silence height
120mm.Cooling device cross air blasting height 1500mm, 21 DEG C of wind-warm syndrome, wind speed 0.35m/s.Spinneret specification is Φ 85, and thread eye is cut
Face " * " (B), 80 DEG C of the temperature of first pair of hot-rolling group, 100 DEG C of the temperature of second pair of hot-rolling group, draw ratio 1.30, winding speed
3400m/min.Finished silk breaking strength >=3.9cN/dtex of spinning, extension at break 30%, oil content 1.13%.
In conclusion PLA polylactic acid provided by through the invention perspires manufactured by the production method of emulation silk fiber
Emulation silk fiber is perspired, the raw material by then passing through polylactic acid material is made, not by fibre-forming polymer preparation, thus
It solves the problems, such as to be conducive to PLA polylactic acid using environmental pollution caused by fibre-forming polymer in the prior art and perspire Silk
Effective popularization of 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. the production method that a kind of PLA polylactic acid perspires emulation silk fiber, which is characterized in that the production method includes:
Polylactic acid raw material is provided；
Provided polylactic acid raw material is dry, and the moisture content of the polylactic acid raw material after drying is less than 25ppm；
Polylactic acid raw material after drying is delivered in filament spinning component by screw extruder, the polylactic acid raw material is through the spiral shell
The melting compression of bar extruder, forms the polylactic acid raw material of molten condition, the temperature control of the screw extruder 170 DEG C~
230℃；
The polylactic acid raw material of the molten condition sprays tow through the filament spinning component, and the spinneret orifice of the filament spinning component is in wire vent
Section on direction is "+" type, " * " type or " rice " type, and the spinneret orifice length-width ratio is 5~10；
The 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. the production method that a kind of PLA polylactic acid according to claim 1 perspires emulation silk fiber, which is characterized in that institute
Stating polylactic acid raw material is spinning-grade polylactic acid slice, and for average molecular weight between 200000-300000, fusing point is 173~178
℃。
3. the production method that a kind of PLA polylactic acid according to claim 1 perspires emulation silk fiber, which is characterized in that institute
It states the drying of provided polylactic acid raw material, 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.
4. the production method that a kind of PLA polylactic acid according to claim 3 perspires emulation silk fiber, which is characterized in that will
Provided polylactic acid raw material is dry, further includes:
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.
5. the production method that a kind of PLA polylactic acid according to claim 1 perspires emulation silk fiber, which is characterized in that institute
Molten condition polylactic acid raw material is stated after the filament spinning component sprays tow, is siphoned away spinning monomer by suction unit, it is described
Suction unit is arranged between the filament spinning component and the cross air blowing device.
6. a kind of PLA polylactic acid according to claim 1-5 perspires the production method of emulation silk fiber, feature
It is, the cross air blowing device includes blowing cabinet, air inlet cylinder, and the blowing top of the box is provided with multiple harness cord holes, described
The blowing bottom of box is provided with hole and wind net, and the horizontal side of the through hole, the air inlet is arranged in the wind net
The lower section of the wind net is arranged in cylinder；
Multiple harness cord holes and the through hole are located on same vertical direction.
7. the production method that a kind of PLA polylactic acid according to claim 6 perspires emulation silk fiber, which is characterized in that institute
Stating blowing cabinet has the first side wall, and for the first side wall close to the wind net, the first side wall and the wind net are at an acute angle
Setting.
8. the production method that a kind of PLA polylactic acid according to claim 7 perspires emulation silk fiber, which is characterized in that institute
It states and is vertically provided with filter layer in blow box body, the first side wall is connected at the top and bottom of the filter screen
Top and the wind are online.
9. the production method that a kind of PLA polylactic acid according to claim 7 perspires emulation silk fiber, which is characterized in that institute
Stating blowing cabinet also has second sidewall, and the second sidewall and the first side wall are oppositely arranged, in the second sidewall
It is provided with that two fans are opposite and openable door.
10. the production method that a kind of PLA polylactic acid according to claim 1 perspires emulation silk fiber, which is characterized in that institute
It states the tow pulled out from the path 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 described second
Roller group temperature to hot-rolling group is 90 DEG C~110 DEG C, and drafting multiple is 1.3~1.8, and wrapping wire 4.5~6.5 encloses, the tension tune
The drafting multiple of section guide wire disk is 0.95~1.0.
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Application publication date: 20190827 |