CN1303122C - Production equipment of polyurethane fibre chip and application method of said polyurethane fibre chip - Google Patents
Production equipment of polyurethane fibre chip and application method of said polyurethane fibre chip Download PDFInfo
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- CN1303122C CN1303122C CNB031341756A CN03134175A CN1303122C CN 1303122 C CN1303122 C CN 1303122C CN B031341756 A CNB031341756 A CN B031341756A CN 03134175 A CN03134175 A CN 03134175A CN 1303122 C CN1303122 C CN 1303122C
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Abstract
The present invention relates to a production device for spandex slices and an application method thereof for preparing spandex slices. The production device comprises material storing tanks, a high-speed mixing tank, a double-screw extruder, an underwater granulator, a dewaterer, a drier and a material storing bin connected through pipelines, the material storing tanks of raw materials (namely polymer diol and diisocyanate are respectively connected with the high-speed mixing tank through an insulated material tank with a metering pump, a prereaction tank with a metering pump connected with the high-speed mixing tank and chain extender insulated material tank with a metering pump are together connected with the double-screw extruder whose temperature is controlled by stage, and a booster pump and a fusant filter are orderly connected between the double-screw extruder and the underwater granulator. Good production raw materials (namely spandex slices) with good thermal property can be prepared by the production device, and in melt spinning, application is carried out by adding crosslinking agent matched with the raw materials. The present invention has the advantages of convenient operation, obviously simplified spandex production technology, reduced investment for devices, reduced production cost, obviously improved ecological environment, obviously improved working condition and improved spinning quality.
Description
Technical field
The present invention relates to a kind of scorification spinning spandex fibre raw materials for production---application method of the production equipment of spandex section and the spandex section of preparation thereof that is used for
Background technology
Spandex section is a kind of novel material that has linear feature, can adopt smelting process spinning spandex fibre in the Polyurethane Thermoplastic Elastomer (TPU), i.e. spinning level TPU.China is commonly called as " spandex section ".
The spinning method for genuine of spandex fibre has four kinds: i.e. dry method, wet method, chemical method and scorification.Its dry method, wet method are basic identical, are about to raw material and additive and must be dissolved in solvent, make solution.With solution extruding spinning hole, form strand again.In technological process, solvent can be removed (dry method) by hot nitrogen, or by other solvent absorbing (wet method), remaining elastomerics then is cured as fiber.Two kinds of current commonly used solvents are respectively dimethyl formamide (DMF) and N,N-DIMETHYLACETAMIDE (DMAc), and two kinds of solvent highly volatiles can cause serious harm and pollute human body and environment.Therefore, dry method, wet method spinning is wanted the manufacturer to drop into substantial contribution to be used for solvent recuperation, the cost of investment of spandex product and production cost are remained high.Country has limited development to this.
Scorification spins spandex fibre, then is the square in recent years spandex new process for producing that grows up, and has soft feel, outstanding weather resistance, resistance to chlorine, hydrolytic resistance, also have the spinning speed height simultaneously, need not solvent, investment and the low green spandex fibre of production cost.But existing scorification spinning is more difficult to get the good elastic polyurethane silk of thermal characteristics owing to be subjected to the restriction of reaction conditions.
At present, existing both at home and abroad German BASF, U.S.'s promise reputation, Japanese clock spin, Kuraray and China is all relevant for the patent disclosure report of melt-spun spandex slice aspect.As disclosed a kind of Polyurethane Thermoplastic Elastomer in the CN1068341A patent gazette, its manufacture method then is a kind of employing pre-polymerization method technology, and it has used static mixing reactor, and it is passive from stream mode that the reaction of prepolymer is in.Abundant for guaranteeing its prepolymerization reaction, then must there be the time enough to guarantee, this has increased the time required in the production process undoubtedly, has reduced production efficiency.Simultaneously, 240～270 ℃ the high temperature polymerization pattern that it adopts makes the material in the reactor generate degraded, and this will influence the quality of finished product.
In a kind of method of producing polyurethane elastomeric fiber that in the CN1108705A patent gazette, discloses, adopt raw material tetrahydrofuran (THF) polyethers (PTMG)) and vulcabond (MDI) and chainextender 1,4-butyleneglycol (BDO) etc., with single stage method polymerization and given processing condition, utilize the twin screw extruder one-step synthesis linear polyester spandex fiber of axial 4-5 section temperature control.The processing condition of this method are only applicable to the laboratory, especially five of twin screw extruder sections the highest theoretical values of temperature control only are 200 ℃, be difficult to guarantee that material obtains sufficient polyreaction, simultaneously generate gel easily, still more, a whole set of production equipment does not filter measure yet, therefore, the existence of its gel particles must influence the carrying out of spinning process, and it not only reduces stability of spinning process, and be difficult to make thermal characteristics good, elastic polyurethane silk uniformly.
Summary of the invention
The application method that the purpose of this invention is to provide the spandex section of a kind of production equipment of spandex section and preparation thereof, adopt this production equipment can prepare the good raw materials for production spandex section of thermal characteristics and be applied to scorification and spin spandex fibre, and it is easy to operate, significantly simplify urethane elastic fiber production technology, reduce facility investment and reduce production costs, obviously improve the ecological environment and working conditions, improve spinning quality.
The object of the present invention is achieved like this: this device comprises the storage tank that connects by pipeline; the high-speed mixing jar; twin screw extruder; underwater pelletizer; water extracter; moisture eliminator and storage bin; its technical essential is: the storage tank of raw material macromolecule diol and vulcabond is connected with the high-speed mixing jar by the insulation batch can that has volume pump respectively; the tank connected pre-reaction jar that has volume pump of high-speed mixing is connected to sectional temperature-controlled twin screw extruder altogether with the chainextender insulation batch can that has volume pump; be linked in sequence between twin screw extruder and underwater pelletizer topping-up pump and melt the body strainer, described pre-reaction jar is selected for use and is had three leaf swept-back stirring at low speed pre-reaction jars.
The above-mentioned built-in filter opening of body strainer that melts is the filter core of 10-20 μ m.
The application method of the spandex section of above-mentioned production equipment preparation is: spandex section adds the linking agent that is complementary with it in the melt-spinning process, the NCO content of linking agent is 3.5～5.5%, and its add-on is the 12-20% weight part of spandex section.
Because the present invention is the good custom-designed production equipment of raw materials for production spandex section of preparation thermal characteristics, so can fundamentally overcome the defective that prior art exists.This device is provided with the volume pump of accurate base feed especially and makes it carry out the pre-reaction jar of prepolymerization reaction; Be provided with and make prepolymer and chainextender after the volume pump of accurately metering and metering, enter sectional temperature-controlled twin screw extruder simultaneously again, under the thermophilic condition, finish and close reaction; In addition, also being provided with between twin screw extruder and underwater pelletizer is elimination gel particles and impurity, and material is played the efficient topping-up pump of homogeneous effect and melts the body strainer.The good spandex section of thermal characteristics because of above-mentioned production equipment preparation, be used for the melt-spinning process, add the linking agent that is complementary with it, so production equipment of the present invention, application art flow process and processing parameter by this device preparation spandex section, than the disclosed patent report in home and abroad, all have one's own knack.It is easy to operate, can significantly simplify urethane elastic fiber production technology, reduces facility investment and reduces production costs, and obviously improves the ecological environment and working conditions, and characteristics such as raising spinning quality are that other prior art is incomparable.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is a kind of concrete structure synoptic diagram of production equipment of the present invention.
Embodiment
Describe concrete structure of the present invention and working process in detail according to Fig. 1 and embodiment.This device comprises raw material macromolecule diol storage tank 3, raw material vulcabond storage tank 2, chainextender low-molecular-weight diol storage tank 1, high-speed mixing jar 10, volume pump 8,9,7,12, twin screw extruder 13, the topping-up pump 15 that connects by pipeline and melts parts such as body strainer 16, underwater pelletizer 17, water extracter 19, moisture eliminator 20 and storage bin 22.Macromolecule diol storage tank 3 and vulcabond storage tank 2 are connected with high-speed mixing jar 10 with 5 with 8 insulation batch can 6 by having volume pump 9 respectively.The pre-reaction jar that has volume pump 12 11 that high-speed mixing jar 10 connects is connected to sectional temperature-controlled twin screw extruder 13 altogether with the chainextender insulation batch can 4 that has volume pump 7, be linked in sequence between twin screw extruder 13 and the underwater pelletizer 17 topping-up pump 15 with melt body strainer 16.For realizing accurate measurement, that volume pump 8,9,7,12 is selected for use is that U.S. Parker Hannifin Corp. makes, Measuring Precision is at the precision gear volume pump below 0.5%, and has electrically heated interlayer and self-cleaning function in the present embodiment.Pre-reaction jar 11 is selected for use and is had three leaf swept-back stirring at low speed pre-reaction jars.The twin screw extruder that twin screw extruder 13 selects for use domestic Nanjing to produce, screw diameter is 72mm, length-to-diameter ratio is 48: 1, divides 12 sections temperature controls.The melt filtration part is to melt body strainer 16 by efficient topping-up pump 15 cooperations of variable frequency control to finish, and melting body strainer 16 built-in filter openings is the filter core of 10-20 μ m.The granulation underwater unit that is exclusively used in TPU class material that underwater pelletizer 17 adopts U.S. Gala company to produce.
Utilize above-mentioned production equipment to prepare spandex section by following operation steps:
The main synthesis material that this example adopts is macromolecule diol and vulcabond and chainextender low-molecular-weight diol etc.The R value of raw materials used mol ratio is 0.95～1.1 scope, is preferably 0.98～1.05; According to user's requirement, stablizer can also be added, softener, matting agent etc. respectively.Temperature being controlled at the material chainextender low-molecular-weight diol, vulcabond, the macromolecule diol that melt in 75～80 ℃ the drying room is delivered to respectively in separately the insulation batch can 4,5,6, the batch can temperature is followed successively by 60 ℃, 80 ℃ and 75 ℃, the temperature of each volume pump is also corresponding with the temperature of its batch can.Macromolecule diol and vulcabond through volume pump 9,8 accurate measurements enter super mixer 10 simultaneously, enter premix retort 11 after the mixing, through the prepolymer that fully reacts, enter twin screw extruder 13 simultaneously through volume pump 12 meterings and the chainextender low-molecular-weight diol that measures through volume pump 7 once more, under its mixing effect, finish polyreaction, its slurry under the effect of topping-up pump 15 by melting body strainer 16, the effect of strainer is to eliminate gel particles and the impurity that exceeds standard, and material is played the effect of homogeneous.Directly enter underwater pelletizer 17 through the material after filtering, make uniformly, rugby ball shape, particle---the spandex section that white is transparent.Then, under the effect of water coolant, enter water extracter 19 through cooling water channel 18, moisture eliminator 20, vibratory screening apparatus 21 arrive storage tank 22.Sampling records 171～184 ℃ of the fusing points of section, the fusion ester several 24.523 (190 ℃, 8.7Kg), softening temperature is 67 ℃, through the 32 package industrial spinning unit spinning of four positions, the linking agent add-on is 15% weight part of spandex section, records fiber index: fiber number 35.3d, intensity 1.66g/d, elongation 464%, 300% resilience 96%, full-rolling rate 98.6%, broken end hardly.Additive drawing-in device 14 in the device can add different additives according to user's different needs.Each of twin screw extruder section temperature condition setting range should determine according to actual needs that generally between 130～260 ℃, polymerization time was advisable with 1～8 minute, but with regard to the length-to-diameter ratio difference of twin screw extruder, polymerization time was best with 2～6 minutes.
Preparation spandex section synthesis material commonly used is:
Isocyanic ester: 4,4-diphenylmethanediisocyanate (MDI) and tolylene diisocyanate (TDI) all adapt to the production of TPU, and the phenyl ring texture of MDI is more suitable for spandex section, makes its hardness moderate, little form separating effect is better.
Macromolecule diol: macromolecule diol contacts with vulcabond and produces chemical reaction, forms the soft tissue among the TPU, and provides such as no crystallization characteristics such as elasticity and snappinesies for polymer polyatomic alcohol.Macromolecule diol preferably selects the macromolecule diol of one or two or more kinds to use from polyester glycol, polyether glycol, polycarbonate diol, polyester ether glycol.The uvioresistant of polyester, anti-oxidant and chemical resistance is preferable wherein, the then anti-hydrolysis of polyethers, stability is best.
Chainextender: chainextender and isocyanate reaction, form TPU sclerous tissues, the chainextender of the most frequently used production spandex section is a low-molecular-weight diol 1,4-butyleneglycol (BDO) also can be selected ethylene glycol for use, propylene glycol, 1,5-pentanediol, 1,6-hexylene glycol etc.
Above-mentioned synthesis material is fused into liquid state through heating, the method for melt can adopt steam, electrically heated, and hot water bath.Be melt into liquid raw material and be transported to separately insulation batch can respectively, and dewater and nitrogen-sealed is handled.
The spandex section of this production equipment preparation is applied in the melt-spinning process, because second melting can cause to a certain degree degraded to the former performance of section, is performance and the fibre property of repairing and improve section, needs to add the proper amount of cross-linking agent that is complementary with it.The NCO content of linking agent is 3.5～5.5%, and its add-on is 12～20% weight parts of spandex section.
The prescription of linking agent and preparation method are as follows in the present embodiment:
The molecular weight of getting 31 weight parts is 1000 PTMG, the molecular weight of 47 weight parts is the MDI of 3050 pure and mild 22 weight parts of polyester polyols, add reactor respectively, stir and start, temperature of reaction kettle is controlled at 80～90 ℃, reacts 2 hours, waits to reduce to the room temperature discharging, must not contact with air during discharging, and need the nitrogen-sealed packing.
The prescription of linking agent must be complementary with corresponding spandex section.Spandex section difference, the prescription of linking agent are also different, but should guarantee that its NCO content is 3.5～5.5%.The addition of linking agent has a direct impact the performance of fiber, increase along with linking agent, the intensity enhancing of fiber, elongation at break descends, 300% response rate then is tending towards rising, the add-on of linking agent should be looked the performance decision of section itself, and generally 12～20% weight parts with spandex section are good.
Claims (3)
1; a kind of production equipment of spandex section; comprise the storage tank that connects by pipeline; the high-speed mixing jar; twin screw extruder; underwater pelletizer; water extracter; moisture eliminator and storage bin; it is characterized in that: the storage tank of raw material macromolecule diol and vulcabond is connected with the high-speed mixing jar by the insulation batch can that has volume pump respectively; the tank connected pre-reaction jar that has volume pump of high-speed mixing is connected to sectional temperature-controlled twin screw extruder altogether with the chainextender insulation batch can that has volume pump; be linked in sequence between twin screw extruder and underwater pelletizer topping-up pump and melt the body strainer, described pre-reaction jar is selected for use and is had three leaf swept-back stirring at low speed pre-reaction jars.
2, the production equipment of spandex section according to claim 1 is characterized in that: melting the built-in filter opening of body strainer is the filter core of 10-20 μ m.
3, a kind of application method of the spandex section according to the preparation of the described production equipment of claim 1, it is characterized in that: described spandex section is in the melt-spinning process, add the linking agent that is complementary with it, the NCO content of linking agent is 3.5～5.5%, and its add-on is 12～20% weight parts of spandex section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031341756A CN1303122C (en) | 2003-08-28 | 2003-08-28 | Production equipment of polyurethane fibre chip and application method of said polyurethane fibre chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB031341756A CN1303122C (en) | 2003-08-28 | 2003-08-28 | Production equipment of polyurethane fibre chip and application method of said polyurethane fibre chip |
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| CN1515706A CN1515706A (en) | 2004-07-28 |
| CN1303122C true CN1303122C (en) | 2007-03-07 |
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| CNB031341756A Expired - Fee Related CN1303122C (en) | 2003-08-28 | 2003-08-28 | Production equipment of polyurethane fibre chip and application method of said polyurethane fibre chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021672A (en) * | 2010-12-10 | 2011-04-20 | 太仓市金祥氨纶纤维有限公司 | Fused direct spinning hyperfine denier polyurethane fibre device in single static agitated reactor |
| CN102051698A (en) * | 2010-12-10 | 2011-05-11 | 太仓市金祥氨纶纤维有限公司 | Equipment for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers |
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| CN101974789B (en) * | 2010-11-04 | 2012-05-02 | 滁州友林科技发展有限公司 | Twin-screw extruder pressurizing system used for blended spinning |
| CN102051699B (en) * | 2010-12-10 | 2012-05-23 | 太仓市金祥氨纶纤维有限公司 | Equipment for producing molten direct spun superfine denier polyurethane fibers by guide silk stretching of double-way silk guide roller |
| CN102115919B (en) * | 2010-12-10 | 2013-02-13 | 太仓市金祥氨纶纤维有限公司 | Melting and direct-spinning superfine denier (4.6-5.5 denier) high-elastic modulus polyurethane fiber equipment |
| CN102021666B (en) * | 2010-12-10 | 2012-05-23 | 太仓市金祥氨纶纤维有限公司 | Method for producing melt direct spinning superfine denier polyurethane fibers through guide yarn stretching of double godet rollers |
| CN104088020B (en) * | 2014-07-14 | 2017-01-11 | 连云港杜钟新奥神氨纶有限公司 | Small-batch spandex spinning testing apparatus |
| CN105137728A (en) * | 2015-07-02 | 2015-12-09 | 武汉宝特龙科技股份有限公司 | Powdered ink preparation apparatus and preparation method |
| CN107164814B (en) * | 2017-07-24 | 2019-05-21 | 冯鹰 | A kind of equipment that melt body directly spins spandex |
| CN107164815B (en) * | 2017-07-24 | 2019-05-21 | 冯鹰 | A kind of melt body directly spins the process of spandex |
| CN107881573A (en) * | 2017-12-19 | 2018-04-06 | 广东蒙泰高新纤维股份有限公司 | A kind of low melting point high-tension ternary polymerization PP TPU core-sheath monofilament and preparation method thereof |
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Patent Citations (6)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021672A (en) * | 2010-12-10 | 2011-04-20 | 太仓市金祥氨纶纤维有限公司 | Fused direct spinning hyperfine denier polyurethane fibre device in single static agitated reactor |
| CN102051698A (en) * | 2010-12-10 | 2011-05-11 | 太仓市金祥氨纶纤维有限公司 | Equipment for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers |
| CN102051698B (en) * | 2010-12-10 | 2012-07-25 | 太仓市金祥氨纶纤维有限公司 | Equipment for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers |
| CN102021672B (en) * | 2010-12-10 | 2012-07-25 | 太仓市金祥氨纶纤维有限公司 | Fused direct spinning hyperfine denier polyurethane fibre device in single static agitated reactor |
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