CN1245545C - Melt spun spandex waste silk reusing method - Google Patents
Melt spun spandex waste silk reusing method Download PDFInfo
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- CN1245545C CN1245545C CNB2004100543292A CN200410054329A CN1245545C CN 1245545 C CN1245545 C CN 1245545C CN B2004100543292 A CNB2004100543292 A CN B2004100543292A CN 200410054329 A CN200410054329 A CN 200410054329A CN 1245545 C CN1245545 C CN 1245545C
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- polyurethane fiber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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Abstract
The present invention discloses a method for reusing silk waste of melt spun spandex, which comprises the following steps: a high point reagent is added to silk waste of melt spun spandex, and then, a compound containing reactive hydrogen is added to the silk waste of melt spun spandex for reaction for 0.5 to 4 hours at the reaction temperature of 160 to 220 DEG C in an inert atmosphere to obtain a yellow thick liquid; liquefied raw material of the silk waste of melt spun spandex reacts with polyether glycol or polyesther glycol and diisocyanate by a conventional method to be regenerated into polyurethane elastomer. The method of the present invention recycles the silk waste of melt spun spandex, has simple and convenient operation process and solves the problem of serious environment pollution due to silk waste generated during production, thereby having wide industrial application prospects.
Description
Technical field
The present invention relates to the method that a kind of melt-spun polyurethane fiber waste utilizes again.
Background technology
Advantages such as technological process is simple, equipment investment is few, production efficiency is high owing to having, production process is not used solvent for the spandex melt spinning, low in the pollution of the environment become the most economic and the most friendly to environment spandex production new technology.
Melt-spinning technology is produced spandex, spins company clearly by the day of Japan at first and takes the lead in realizing industrialization, and subsequently, the clock of Japan spins company, Kuraray company has developed melt spun spandex production technology separately in succession.China also starts to walk in the research aspect the spandex melt spinning in recent years, and has realized industrialization, and output increases year by year.The waste silk that produces in the production process has caused the serious environmental pollution problem simultaneously.Therefore, how melt-spun polyurethane fiber waste is utilized the common concern that is subjected to people again.Though the raw material of melt spun spandex is a Polyurethane Thermoplastic Elastomer, owing to used reactive additive in the melt spun spandex production process, make the fiber that obtains have the structure of chemical crosslinking, can not dissolve, can not fusion, can't carry out secondary operations.If these waste silks are abandoned, not only can cause pollution to environment, also cause the significant wastage of resource.
Summary of the invention
The technical issues that need to address of the present invention are to disclose the method that a kind of melt-spun polyurethane fiber waste utilizes again, cause the serious environmental pollution problems to solve the waste silk that produces in the production process.
Method of the present invention comprises the steps:
Melt-spun polyurethane fiber waste is added higher boiling reagent, and the mass ratio of melt-spun polyurethane fiber waste and higher boiling reagent is 1: 5-3: 1, and more suitable ratio is 1: 2-2: 1;
Add the compound that has active hydrogen then, its consumption accounts for the 0.1-2% of melt-spun polyurethane fiber waste quality, and more suitable consumption is the 0.5-1% of melt-spun polyurethane fiber waste quality;
Under inert atmosphere, to react 0.5-4 hour, the more suitable reaction time is 1-2 hour, reaction temperature is 160-220 ℃, should be controlled at 180-200 ℃ than suitable reaction temperature, obtains yellow thick liquid;
Melt-spun polyurethane fiber waste raw material with liquefaction adopts conventional method to mix by arbitrary proportion with PTMEG or polyester-diol then, with di-isocyanate reaction, regenerates polyurethane elastomer again;
Said melt-spun polyurethane fiber waste comprises polyester-type melt-spun polyurethane fiber waste or polyether-type melt-spun polyurethane fiber waste;
Said higher boiling reagent is selected from triethyl phosphate, diglycol or 1, a kind of in the 4-butanediol;
The said compound that has active hydrogen is selected from a kind of in acetamide, benzyl carbinol or the phenol;
According to the present invention, can in said mixture, add proper catalyst, with the raising reaction speed, but be not essential.
By above-mentioned disclosed technical scheme as seen, method of the present invention melt-spun polyurethane fiber waste can be recycled again, and operating process is simple and convenient, can solve the waste silk that produces in the production process and cause the serious environmental pollution problems, have bigger industrial applications prospect.
The specific embodiment
Embodiment 1
40 gram triethyl phosphates addings are equipped with in the 250ml three-neck flask of reflux condensation mode, add 20 gram polyether-type melt-spun polyurethane fiber wastes and 2 gram acetamides then, under logical nitrogen and churned mechanically situation, reacted 1 hour, reaction temperature is controlled at 180 ℃, and reaction obtains yellow thick liquid after finishing.Inherent viscosity is 0.176dl/g.
Embodiment 2
Operating process is identical with example 1, and reaction temperature is elevated to 200 ℃, and the inherent viscosity that obtains yellow thick liquid is 0.145dl/g.
Embodiment 3
Operating process is identical with example 1, and reaction temperature is reduced to 160 ℃, and the inherent viscosity that obtains light yellow viscous liquid is 0.455dl/g.
Embodiment 4
Operating process is identical with example 1, substitutes acetamide with benzyl carbinol, and the inherent viscosity that obtains yellow thick liquid is 0.362dl/g.
Embodiment 5
Operating process is identical with example 1, substitutes acetamide with phenol, and the inherent viscosity that obtains yellow thick liquid is 0.651dl/g.
Embodiment 6
Operating process is identical with example 1.Substitute the polyether-type melt-spun polyurethane fiber waste with the polyester-type melt-spun polyurethane fiber waste, the inherent viscosity that obtains yellow thick liquid is 0.137dl/g.
Embodiment 7
Operating process is identical with example 1, substitutes triethyl phosphate with diglycol, and the inherent viscosity that obtains yellow thick liquid is 0.351dl/g.
Embodiment 8
Operating process is identical with example 1, and with 1, the 4-butanediol substitutes triethyl phosphate, and the inherent viscosity that obtains yellow thick liquid is 0.547dl/g.
Mixed with melt-spun polyurethane fiber waste raw material and PTMEG or the polyester-diol of liquefaction is 1: 1 by weight adds vulcabond and catalyst in proportion, and after stirring, vacuum defoamation is poured die for molding then into or be pressed into film on glass plate.Carry out precuring at 60-90 ℃, more suitable precuring temperature is 70-85 ℃, and time 1-6 hour, the more suitable precuring time was 2-4 hour.At room temperature place then more than 48 hours, carry out the back again and solidify under 100-150 ℃, curing was controlled at time 1-4 hour, obtained polyurethane elastomer.Should be controlled at 110-130 ℃ than proper curing temperature,, be 1-2 hour than appropriate curing time.
Detailed process is exemplified below:
Embodiment 9
With the polyether-type melt-spun polyurethane fiber waste raw material of 10 gram liquefaction and 40 gram-molecular weights is that 2000 PolyTHF mixes, add 10 gram toluene di-isocyanate(TDI)s and 0.06 gram dibutyltin dilaurate then, after stirring, vacuum defoamation, be poured on and be pressed into film on the glass plate, carried out precuring 2 hours, at room temperature placed then 48 hours at 80 ℃, solidified 2 hours the back under 110 ℃ again, obtains the elastic polyurethane body thin film.The fracture strength of film is 5.3Mpa, and elongation at break is 446%.
Embodiment 10
Operating process is identical with example 9, is that 2000 PolyTHF mixes with the polyether-type melt-spun polyurethane fiber waste raw material and 30 gram-molecular weights of 20 gram liquefaction, adds 10 then and restrains toluene di-isocyanate(TDI)s, obtains the elastic polyurethane body thin film.The fracture strength of film is 9.2Mpa, and elongation at break is 369%.
Embodiment 11
Operating process is identical with example 9, is that 2000 PolyTHF mixes with the polyether-type melt-spun polyurethane fiber waste raw material and 25 gram-molecular weights of 25 gram liquefaction, adds 10 then and restrains toluene di-isocyanate(TDI)s, obtains the elastic polyurethane body thin film.The fracture strength of film is 8.3Mpa, and elongation at break is 422%.
Embodiment 12
Operating process is identical with example 9, is that 2000 polycaprolactone mixes with the polyester-type melt-spun polyurethane fiber waste raw material and 25 gram-molecular weights of 25 gram liquefaction, adds 10 then and restrains toluene di-isocyanate(TDI)s, obtains the elastic polyurethane body thin film.The fracture strength of film is 16.8Mpa, and elongation at break is 458%.
Comparative example 1
Operating process is identical with example 9, is 2000 PolyTHF and 10 gram toluene di-isocyanate(TDI)s reactions with 50 gram-molecular weights, obtains the elastic polyurethane body thin film.The fracture strength of film is 35.9Mpa, and elongation at break is 1120%.
Comparative example 2
Operating process is identical with example 9, is that 2000 polycaprolactone mixes and 10 gram toluene di-isocyanate(TDI)s reactions with 50 gram-molecular weights, obtains the elastic polyurethane body thin film.The fracture strength of film is 43.1Mpa, and elongation at break is 825%.
Claims (4)
1. the method that melt-spun polyurethane fiber waste utilizes again is characterized in that, comprises the steps:
Melt-spun polyurethane fiber waste is added higher boiling reagent, add the compound that has active hydrogen then, under inert atmosphere, reacted 0.5-4 hour, reaction temperature is 160-220 ℃, obtains yellow thick liquid;
Melt-spun polyurethane fiber waste raw material with liquefaction adopts conventional method and PTMEG or polyester-diol and di-isocyanate reaction then, regenerates polyurethane elastomer;
Said higher boiling reagent is selected from triethyl phosphate, diglycol or 1, a kind of in the 4-butanediol;
The said compound that has active hydrogen is selected from a kind of in acetamide, benzyl carbinol or the phenol;
The mass ratio of melt-spun polyurethane fiber waste and higher boiling reagent is 1: 5-3: 1;
The compound amount that has active hydrogen accounts for the 0.1-2% of melt-spun polyurethane fiber waste quality.
2. method according to claim 1 is characterized in that, said melt-spun polyurethane fiber waste comprises polyester-type melt-spun polyurethane fiber waste or polyether-type melt-spun polyurethane fiber waste.
3. method according to claim 1 is characterized in that, under inert atmosphere, reacts 1-2 hour, and reaction temperature is 180-200 ℃.
4. method according to claim 1 is characterized in that, conventional method and PTMEG or polyester-diol and the di-isocyanate reaction of melt-spun polyurethane fiber waste raw material employing with liquefaction regenerates polyurethane elastomer in the presence of catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100543292A CN1245545C (en) | 2004-09-07 | 2004-09-07 | Melt spun spandex waste silk reusing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100543292A CN1245545C (en) | 2004-09-07 | 2004-09-07 | Melt spun spandex waste silk reusing method |
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| Publication Number | Publication Date |
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| CN1603480A CN1603480A (en) | 2005-04-06 |
| CN1245545C true CN1245545C (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100543292A Expired - Fee Related CN1245545C (en) | 2004-09-07 | 2004-09-07 | Melt spun spandex waste silk reusing method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219888A (en) * | 2011-05-30 | 2011-10-19 | 上海联景高分子材料有限公司 | Process for manufacturing thermoplastic urethane (TPU) by utilizing waste spandex fiber |
| CN102251316B (en) * | 2011-06-14 | 2012-11-28 | 吴中虎 | Method for producing spandex filament by using recycled spandex filament wastes |
| CN105200564B (en) * | 2015-10-30 | 2017-03-29 | 优彩环保资源科技股份有限公司 | A kind of preparation method of regenerative polyester staple fiber |
| CN105200563B (en) * | 2015-10-30 | 2017-03-29 | 优彩环保资源科技股份有限公司 | A kind of preparation method of regeneration coloured polyester chopped fiber |
| CN115262018B (en) * | 2022-06-25 | 2023-06-13 | 江苏鼎新印染有限公司 | Knitted yoga composite fabric and preparation method thereof |
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