CN104404636B - Polylactic acid and the pouring-in blend spinning system of Masterbatch - Google Patents
Polylactic acid and the pouring-in blend spinning system of Masterbatch Download PDFInfo
- Publication number
- CN104404636B CN104404636B CN201410599601.9A CN201410599601A CN104404636B CN 104404636 B CN104404636 B CN 104404636B CN 201410599601 A CN201410599601 A CN 201410599601A CN 104404636 B CN104404636 B CN 104404636B
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- melt
- masterbatch
- polylactic acid
- screw extruder
- spinning
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- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 103
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 78
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 78
- 238000009987 spinning Methods 0.000 title claims abstract description 53
- 239000000203 mixture Substances 0.000 title claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 238000001308 synthesis method Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 37
- 230000008676 import Effects 0.000 claims description 24
- 230000003068 static effect Effects 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000000155 melt Substances 0.000 description 12
- 239000000835 fiber Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000002074 melt spinning Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002166 wet spinning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000000578 dry spinning Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
- D01D1/09—Control of pressure, temperature or feeding rate
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (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
Polylactic acid and the pouring-in blend spinning system of Masterbatch, including the dry slices synthesis method pipeline of polylactic acid, polylactic acid screw extruder, Masterbatch feed bin, Masterbatch screw extruder, Masterbatch dosing pump and spinning manifold, in spinning manifold, it is provided with polylactic acid melt allotter, Masterbatch melt extrusion dispensing head, melt metering pump, filament spinning component and spinneret.The present invention is reasonable in design, novel structure, spinning efficiency high, and polylactic acid and Masterbatch distribute mix homogeneously, can improve at original production line, it is achieved that the many tinctorial patterns of machine produce polylactic acid color silk.
Description
Technical field
The invention belongs to chemical fibre spinning technical field, be specifically related to a kind of polylactic acid and the pouring-in blend spinning system of Masterbatch.
Background technology
Chemical fibre spinning includes spinning melt or the preparation of solution, fibre forming and winding and last handling process.Last handling process then has the stretching of as-spun fibre, heat setting to series of processes such as finished product packings.
Existing spinning process has melt spinning and solvent spinning two class.The fibre-forming polymer that notable decomposition does not generally occur in the molten state adopts melt spinning, for instance polyester fiber, Fypro etc..Melt spinning process is simple, and spinning speed is high.The fibre-forming polymer that solution spinning to decompose when being applicable to melted, dissolves fibre-forming polymer the spinning liquid preparing thickness in a solvent, then carries out spinning.By the solidification mode of the spinning liquid thread from capillary spinneret orifice extrusion, solvent spinning is divided into again wet spinning and dry spinning two kinds.It is relatively low that solvent spinning spins speed, especially wet spinning.For improving spinning capability, the spinning head that hole count is a lot of need to be adopted.The speed of spinning of dry spinning is higher than wet spinning, but far below melt spinning.
Existing polylactic acid Masterbatch spining technology has used for reference chemical fibre Masterbatch spining technology; Masterbatch section is adopted quantitatively to send into screw extruder slices synthesis method pipeline by Masterbatch machine; the Masterbatch being about to quantitatively output falls in the solid slice of screw rod direction motion by Masterbatch deadweight, and mixing homogeneity is not high enough.Existing Masterbatch spinning equipment structure is relatively simple, article one, screw extruder can only produce the color silk of a kind of color, melt pipe color melt injection technique can realize a spinning pump and produce a kind of color silk, and a general screw extruder configures the spinning pump of about 6.
Summary of the invention
The present invention is to solve weak point of the prior art, it is provided that a kind of mixing homogeneity is good, production efficiency is high polylactic acid and the pouring-in blend spinning system of Masterbatch.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that polylactic acid and the pouring-in blend spinning system of Masterbatch, including the dry slices synthesis method pipeline of polylactic acid, polylactic acid screw extruder, Masterbatch feed bin, Masterbatch screw extruder, Masterbatch dosing pump and spinning manifold, in spinning manifold, it is provided with polylactic acid melt allotter, Masterbatch melt extrusion dispensing head, melt metering pump, filament spinning component and spinneret；
The outlet of the dry slices synthesis method pipeline of polylactic acid is connected with the import of polylactic acid screw extruder, the outlet of polylactic acid screw extruder is connected by the import of the first pipeline with polylactic acid melt allotter, the outlet of polylactic acid melt allotter is connected with the import of melt metering pump by melt pipe, melt-stoichiometry delivery side of pump is connected with the import of filament spinning component by the 3rd pipeline, and the outlet of filament spinning component is connected with the import of spinneret；The outlet of Masterbatch feed bin is connected with the import of Masterbatch screw extruder, the outlet of Masterbatch screw extruder is connected with the import of Masterbatch dosing pump, Masterbatch metering delivery side of pump is connected with the import of Masterbatch melt extrusion dispensing head by second pipe, and Masterbatch melt extrusion dispensing head is located at inside melt pipe；Being provided with static blender in melt pipe, static blender is between Masterbatch melt extrusion dispensing head and melt metering pump.
Described static blender includes melt pipe body, and melt pipe is originally internal is provided with batch mixing unit；Batch mixing unit includes the first helical baffle and the second helical baffle, melt pipe body is separated into the first semi-circular tube helical duct and the second semi-circular tube helical duct by the first helical baffle, melt pipe body is separated into the 3rd semi-circular tube helical duct and the 4th semi-circular tube helical duct by the second helical baffle, and one side with the second helical baffle of the first helical baffle is all radially arranged along melt pipe body and is mutually connected vertically.
The both sides of described first helical baffle are all radially arranged along melt pipe body and are mutually perpendicular to, and the both sides of the second helical baffle are all radially arranged along melt pipe body and are mutually perpendicular to.
The quantity of described batch mixing unit be more than or equal to two groups, the helical baffle of one group of batch mixing unit with the helical baffle of one group of adjacent batch mixing unit while being mutually connected vertically.
nullAdopt technique scheme，The dry section of polylactic acid is entered in the middle of polylactic acid screw extruder by the dry slices synthesis method pipeline of polylactic acid，Dry for polylactic acid section is melted into polylactic acid melt by polylactic acid screw extruder，And discharge pressure is provided，Polylactic acid melt is entered in polylactic acid melt allotter by the first pipeline，Polylactic acid melt is sent in melt pipe by polylactic acid melt allotter again，Meanwhile，Masterbatch falls into Masterbatch screw extruder from Masterbatch feed bin by deadweight，Masterbatch is melted into Masterbatch melt by Masterbatch screw extruder，And discharge pressure is provided，By Masterbatch dosing pump, Masterbatch melt is squeezed in melt pipe by (charge proportion of Masterbatch section and polylactic acid slice) in certain proportion，Masterbatch melt is extruded from Masterbatch melt extrusion dispensing head，Polylactic acid melt mixing in melt pipe，Become coloured melt，Masterbatch melt and polylactic acid melt pass through the mixing of static blender in melt pipe course of conveying，By melt metering pump, mixed melt is sent in filament spinning component，Last ejection by spinneret makes color silk.
Discharging melt by a Masterbatch melt extrusion dispensing head when Masterbatch melt enters in melt pipe, Masterbatch melt extrusion dispensing head by extruding in Masterbatch melt, makes Masterbatch melt can be evenly distributed in polylactic acid melt by one group of micropore.
For making Masterbatch melt and polylactic acid melt mix evenly, melt pipe adds array static state blender.Coloured melt in melt pipe enters melt metering pump after the mixing by static blender, and by the spinneret pore extrusion molding in filament spinning component, becomes polylactic acid colored fibre after air cooling.Masterbatch dosing pump is contained in Masterbatch screw extruder discharge end, so can maintain easily maintenance.
Owing to polylactic acid melt and Masterbatch melt mix less uniform in melt pipe, therefore static blender is set in melt pipe again.The mixing principle of static blender is as follows: assuming that A melt and B melt are when mixing, A melt enters the first semi-circular tube helical duct, B melt enters the second semi-circular tube helical duct, when A melt and B melt are entered into the second helical baffle by the first helical baffle, due to the first helical baffle while be all radially arranged and be mutually connected vertically along melt pipe body with one side of the second helical baffle, what thus make the part of A melt and B melt is partly in the 3rd semi-circular tube helical duct, another part of A melt and another part of B melt enter in the 4th semi-circular tube helical duct.After the mixing of first group of batch mixing unit, enter back in second group of batch mixing unit, after some groups of batch mixing unit, A melt and B melt mixed uniformly after enter directly into next process.
The present invention is reasonable in design, novel structure, spinning efficiency high, and polylactic acid and Masterbatch distribute mix homogeneously, can improve at original production line, it is achieved that the many tinctorial patterns of machine produce polylactic acid color silk.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the static blender in Fig. 1 with one group of batch mixing unit；
Fig. 3 is the explosive view of Fig. 2.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3, the polylactic acid of the present invention and the pouring-in blend spinning system of Masterbatch, including the dry slices synthesis method pipeline 12 of polylactic acid, polylactic acid screw extruder 13, Masterbatch feed bin 14, Masterbatch screw extruder 15, Masterbatch dosing pump 16 and spinning manifold 17, in spinning manifold 17, it is provided with polylactic acid melt allotter 18, Masterbatch melt extrusion dispensing head 19, melt metering pump 20, filament spinning component 10 and spinneret 11；
The outlet of the dry slices synthesis method pipeline 12 of polylactic acid is connected with the import of polylactic acid screw extruder 13, the outlet of polylactic acid screw extruder 13 is connected with the import of polylactic acid melt allotter 18 by the first pipeline 21, the outlet of polylactic acid melt allotter 18 is connected by the import of melt pipe 22 with melt metering pump 20, the outlet of melt metering pump 20 is connected with the import of filament spinning component 10 by the 3rd pipeline 23, and the outlet of filament spinning component 10 is connected with the import of spinneret 11；The outlet of Masterbatch feed bin 14 is connected with the import of Masterbatch screw extruder 15, the outlet of Masterbatch screw extruder 15 is connected with the import of Masterbatch dosing pump 16, the outlet of Masterbatch dosing pump 16 is connected by the import of second pipe 24 with Masterbatch melt extrusion dispensing head 19, and it is internal that Masterbatch melt extrusion dispensing head 19 is located at melt pipe 22；Being provided with static blender 25 in melt pipe 22, static blender 25 is between Masterbatch melt extrusion dispensing head 19 and melt metering pump 20.
Static blender 25 includes melt pipe body 1, is provided with batch mixing unit in melt pipe body 1；Batch mixing unit includes the first helical baffle 2 and the second helical baffle 3, melt pipe body 1 is separated into the first semi-circular tube helical duct 4 and the second semi-circular tube helical duct 5 by the first helical baffle 2, melt pipe body 1 is separated into the 3rd semi-circular tube helical duct 6 and the 4th semi-circular tube helical duct 7 by the second helical baffle 3, and one side with the second helical baffle 3 of the first helical baffle 2 is all radially arranged along melt pipe body 1 and is mutually connected vertically.
The both sides of the first helical baffle 2 are all radially arranged along melt pipe body 1 and are mutually perpendicular to, and the both sides of the second helical baffle 3 are all radially arranged along melt pipe body 1 and are mutually perpendicular to.
In order to improve the uniformity of mixing, it is possible to arrange the quantity of batch mixing unit be more than or equal to two groups, the helical baffle of one group of batch mixing unit with the helical baffle of one group of adjacent batch mixing unit while being mutually connected vertically.
Polylactic acid screw extruder 13 in the middle of the present invention, Masterbatch screw extruder 15, Masterbatch dosing pump 16, polylactic acid melt allotter 18, melt metering pump 20, filament spinning component 10 and spinneret 11 are existing mature technology, and specific configuration repeats no more.
nullThe specific works process of the present invention is as follows: the dry section of polylactic acid is entered in the middle of polylactic acid screw extruder 13 by the dry slices synthesis method pipeline 12 of polylactic acid，Dry for polylactic acid section is melted into polylactic acid melt by polylactic acid screw extruder 13，And discharge pressure is provided，Polylactic acid melt is entered in polylactic acid melt allotter by the first pipeline 21，Polylactic acid melt is sent in melt pipe 22 by polylactic acid melt allotter again，Meanwhile，Masterbatch falls into Masterbatch screw extruder from Masterbatch feed bin 14 by deadweight，Masterbatch is melted into Masterbatch melt by Masterbatch screw extruder 15，And discharge pressure is provided，By Masterbatch dosing pump 16, Masterbatch melt is squeezed in melt pipe 22 by (charge proportion of Masterbatch section and polylactic acid slice) in certain proportion，Masterbatch melt is extruded from Masterbatch melt extrusion dispensing head 19，Polylactic acid melt mixing in melt pipe 22，Become coloured melt，Masterbatch melt and polylactic acid melt pass through the mixing of static blender 25 in melt pipe 22 course of conveying，By melt metering pump 20, mixed melt is sent in filament spinning component 10，Last ejection by spinneret 11 makes color silk.
Masterbatch melt discharges melt by a Masterbatch melt extrusion dispensing head 19 when entering in melt pipe 22, Masterbatch melt extrusion dispensing head 19 by extruding in Masterbatch melt, makes Masterbatch melt can be evenly distributed in polylactic acid melt by one group of micropore.
For making Masterbatch melt and polylactic acid melt mix evenly, melt pipe 22 adds array static state blender 25.Coloured melt in melt pipe 22 enters melt metering pump 20 after the mixing by static blender 25, and by the spinneret 11 pore extrusion molding in filament spinning component 10, becomes polylactic acid colored fibre after air cooling.Masterbatch dosing pump 16 is contained in Masterbatch screw extruder 15 discharge end, so can maintain easily maintenance.
Owing to polylactic acid melt and Masterbatch melt mix less uniform in melt pipe 22, therefore static blender 25 is set in melt pipe 22 again.The mixing principle of static blender 25 is as follows: assuming that A melt and B melt are when mixing, A melt enters the first semi-circular tube helical duct 4, B melt enters the second semi-circular tube helical duct 5, when A melt and B melt are entered into the second helical baffle 3 by the first helical baffle 2, due to the first helical baffle 2 while be all radially arranged and be mutually connected vertically along melt pipe body 1 with one side of the second helical baffle 3, what thus make the part of A melt and B melt is partly in the 3rd semi-circular tube helical duct 6, another part of A melt and another part of B melt enter in the 4th semi-circular tube helical duct 7.After the mixing of first group of batch mixing unit, enter back in second group of batch mixing unit, after some groups of batch mixing unit, A melt and B melt mixed uniformly after enter directly into next process.
Above example is only in order to illustrative not limiting technical scheme, although the present invention being described in detail with reference to above-described embodiment, it will be understood by those within the art that: still the present invention can be modified or equivalent replacement, without deviating from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (3)
1. polylactic acid and the pouring-in blend spinning system of Masterbatch, it is characterized in that: include the dry slices synthesis method pipeline of polylactic acid, polylactic acid screw extruder, Masterbatch feed bin, Masterbatch screw extruder, Masterbatch dosing pump and spinning manifold, in spinning manifold, be provided with polylactic acid melt allotter, Masterbatch melt extrusion dispensing head, melt metering pump, filament spinning component and spinneret；
The outlet of the dry slices synthesis method pipeline of polylactic acid is connected with the import of polylactic acid screw extruder, the outlet of polylactic acid screw extruder is connected by the import of the first pipeline with polylactic acid melt allotter, the outlet of polylactic acid melt allotter is connected with the import of melt metering pump by melt pipe, melt-stoichiometry delivery side of pump is connected with the import of filament spinning component by the 3rd pipeline, and the outlet of filament spinning component is connected with the import of spinneret；The outlet of Masterbatch feed bin is connected with the import of Masterbatch screw extruder, the outlet of Masterbatch screw extruder is connected with the import of Masterbatch dosing pump, Masterbatch metering delivery side of pump is connected with the import of Masterbatch melt extrusion dispensing head by second pipe, and Masterbatch melt extrusion dispensing head is located at inside melt pipe；Being provided with static blender in melt pipe, static blender is between Masterbatch melt extrusion dispensing head and melt metering pump；
Described static blender includes melt pipe body, and melt pipe is originally internal is provided with batch mixing unit；Batch mixing unit includes the first helical baffle and the second helical baffle, melt pipe body is separated into the first semi-circular tube helical duct and the second semi-circular tube helical duct by the first helical baffle, melt pipe body is separated into the 3rd semi-circular tube helical duct and the 4th semi-circular tube helical duct by the second helical baffle, and one side with the second helical baffle of the first helical baffle is all radially arranged along melt pipe body and is mutually connected vertically.
2. polylactic acid according to claim 1 and the pouring-in blend spinning system of Masterbatch, it is characterized in that: the both sides of described first helical baffle are all radially arranged along melt pipe body and are mutually perpendicular to, and the both sides of the second helical baffle are all radially arranged along melt pipe body and are mutually perpendicular to.
3. polylactic acid according to claim 2 and the pouring-in blend spinning system of Masterbatch, it is characterized in that: the quantity of described batch mixing unit be more than or equal to two groups, the helical baffle of one group of batch mixing unit with the helical baffle of one group of adjacent batch mixing unit while being mutually connected vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410599601.9A CN104404636B (en) | 2014-10-31 | 2014-10-31 | Polylactic acid and the pouring-in blend spinning system of Masterbatch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410599601.9A CN104404636B (en) | 2014-10-31 | 2014-10-31 | Polylactic acid and the pouring-in blend spinning system of Masterbatch |
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| Publication Number | Publication Date |
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| CN104404636A CN104404636A (en) | 2015-03-11 |
| CN104404636B true CN104404636B (en) | 2016-07-13 |
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| CN104862809A (en) * | 2015-05-21 | 2015-08-26 | 苏州富莱克斯氨纶有限公司 | Preparation method of colored melt-spun spandex |
| CN105543992B (en) * | 2016-01-30 | 2017-11-14 | 河南省龙都生物科技有限公司 | Bamboo charcoal particles of polylactic acid spinning system |
| CN105525369B (en) * | 2016-01-30 | 2018-01-30 | 河南省龙都生物科技有限公司 | Bamboo charcoal micropowder polylactic acid slice produces fiber system |
| CN105603551B (en) * | 2016-01-30 | 2017-11-14 | 河南省龙都生物科技有限公司 | Bamboo charcoal polylactic acid slice manufacturing system |
| CN105603550B (en) * | 2016-01-30 | 2017-11-10 | 河南省龙都生物科技有限公司 | Bamboo charcoal PLA blend melt direct fabrics system |
| CN105734702B (en) * | 2016-04-15 | 2017-11-10 | 河南省龙都生物科技有限公司 | PLA delustering fibre direct fabrics system |
| CN105734701B (en) * | 2016-04-15 | 2018-04-20 | 河南省龙都生物科技有限公司 | Polylactic acid slice adds titanium dioxide delustring spinning production technology |
| CN105803565B (en) * | 2016-04-15 | 2018-02-16 | 河南省龙都生物科技有限公司 | PLA delustering fibre direct fabrics production technology |
| CN105714391B (en) * | 2016-04-15 | 2018-04-20 | 河南省龙都生物科技有限公司 | Polylactic acid bi-component composite fiber spinning technique |
| CN109629029A (en) * | 2018-12-21 | 2019-04-16 | 张家港市科达化纤有限公司 | A kind of production method of water repellent anti-pollution type METHOD FOR POLYPROPYLENE BCF long filament |
| 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 |
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| CN2612677Y (en) * | 2003-03-20 | 2004-04-21 | 江苏南黄海实业股份有限公司 | Melt extrusion spandex dismounting type spinning box |
| CN102995151A (en) * | 2012-12-17 | 2013-03-27 | 浙江华欣新材料股份有限公司 | Method for producing color composite polyester yarn through one step |
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2014
- 2014-10-31 CN CN201410599601.9A patent/CN104404636B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2612677Y (en) * | 2003-03-20 | 2004-04-21 | 江苏南黄海实业股份有限公司 | Melt extrusion spandex dismounting type spinning box |
| CN102995151A (en) * | 2012-12-17 | 2013-03-27 | 浙江华欣新材料股份有限公司 | Method for producing color composite polyester yarn through one step |
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