CN106279756A - The polyurethane contained in diethylene glycol alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts - Google Patents
The polyurethane contained in diethylene glycol alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts Download PDFInfo
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- CN106279756A CN106279756A CN201610671695.5A CN201610671695A CN106279756A CN 106279756 A CN106279756 A CN 106279756A CN 201610671695 A CN201610671695 A CN 201610671695A CN 106279756 A CN106279756 A CN 106279756A
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- Prior art keywords
- melt
- diethylene glycol
- waste polyester
- polyurethane
- polyester textile
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The present invention relates to a kind of Waste Polyester high level cycling and reutilization technology, be specifically related to a kind of diethylene glycol alcoholysis and remove the polyurethane that contains in the Waste Polyester textile method for polyester spinning melts.Containing polyurethane in Waste Polyester textile raw material, add raw materials quality 1 ~ 8% diethylene glycol at raw material and enter screw extruder blended melting extrusion, the melt viscosity of screw extruder melt out is 0.40 ~ 0.50dl/g, then material enters that quenched tune is adhesive-assembly puts, and the melt viscosity of the adhesive-assembly melt putting out of quenched tune is 0.635dl/g～0.685dl/g.The present invention interrupts the strand of polyurethane (spandex) by the way of alcoholysis, after polyurethane (spandex) strand destroys, short chain material therein the most most volatilizable out, thus reduce spandex (polyurethane) and exist polyester melt viscosity, mobile performance, the saturated performance of fiber and drawing-off performance and vacuum pipe and the impact of the susceptible to plugging series of problems of tubular heat exchanger.
Description
Technical field
The present invention relates to a kind of Waste Polyester high level cycling and reutilization technology, be specifically related to a kind of diethylene glycol alcoholysis and remove useless poly-
The polyurethane contained in ester textile is for the method for polyester spinning melts.
Background technology
At present, along with the ratio of the development blend fabric of textile differentiation is increasing, increasing blending is weaved
Product are highly detrimental to the recovery of waste spinning fabric, especially Waste Polyester class textile.The wherein Waste Polyester weaving with spandex as representative
Product are the most prominent, mainly reason be a small amount of polyurethane deposit the reduction that can aggravate polyester melt viscosity, simultaneously polyurethane conduct
Polyester poor fluidity and spinnability that its existence of a kind of elastomer can cause are the poorest.It addition, gathering containing spandex (polyurethane)
Owing to polyurethane elastomer molecule having substantial amounts of polar group during ester co-blended spinning, little also with the affinity of nonpolar mineral oil
Cause being remarkably reinforced according to oil water repellent effect of blending polyester, cause final fiber at fatliquoring stage because fiber oil suction water rate is (not enough
The 50% of normal polyester) the coherent difference of difference fiber causes the drawing-off hydraulic performance decline of fiber, the bulkiness in finished fiber and
Elasticity of compression decline, fault content, over-length fibre content increase.
How to improve the recovery utilization rate of the polyester-containing textiles containing spandex (polyurethane) be improve such waste spinning fabric who
By quantity and the key of high-value-use.
The Chinese invention patent (application number: 201010574044.7, the applying date: 2010-12-01) of applicant's application is open
The quenched tune of a kind of waste plastics glues system, including vacuum separation tower；Described vacuum separation tower is arranged over feed(raw material)inlet and vacuum
Mouthful；It is provided with discharging opening below described vacuum separation tower；Described vacuum separation tower appearance is provided with heating agent coil pipe；Described vacuum separation tower
Internal vertical is arranged at intervals with porous plate on direction；Described discharging opening is also connected with that two grades of quenched tune are adhesive-assembly to be put.Owing to adding
One two grades of quenched tune are adhesive-assembly to be put, and is provided with screw rod, is possible not only to promote raw material, and can stir raw material and improve in this device
Viscosity；Singly add a vacuum pump, improve vacuum further, provide reaction environment for material viscosity, the above
Factor combines and facilitates significantly improving of High Viscosity PET plastic raw materials production efficiency.
Current existing Waste Polyester textile thickening mainly by liquid-phase tackifying but because Waste Polyester textile source is multiple
Miscellaneous, be increased by the viscosity of the viscous rear polyester of the quenched tune of liquid phase, but thickening amplitude is relatively limited, the most key is molecular weight
Being distributed relatively wide, its main cause is the limited amount of the functional group of carboxyl and the hydroxyl opened in the polyester fondant after melting,
Limit the generation of polycondensation reaction in (≤500Pa), certain time (25min～65min) section under the conditions of certain vacuum.
Summary of the invention
For melting that the spandex existence run in the foam material use that the Pillar recovery containing spandex (polyurethane) is processed causes
The degraded of body viscosity is big, melt flowability is poor, fiber oils differs from that the fiber obvolvent caused is poor, first break draft poor performance and vacuum pipe
The problems such as tubular heat exchanger easily blocking.The invention provides diethylene glycol alcoholysis and remove the polyurethane contained in Waste Polyester textile
The method of standby polyester spinning melts, the method uses in Waste Polyester textile adds the one or two in appropriate diethylene glycol (DEG)
The mode of the alcohol planted, interrupts the strand of polyurethane (spandex) by the way of alcoholysis, thus reaches to solve polyurethane (spandex)
Purpose.Polyurethane (spandex) strand destroy after, short chain material therein the most most volatilizable out,
Thus reduce spandex (polyurethane) and exist polyester melt viscosity, mobile performance, the saturated performance of fiber and drawing-off performance and true
Vacant duct and the impact of the susceptible to plugging series of problems of tubular heat exchanger.
For achieving the above object, present invention employs following technical scheme:
The polyurethane contained in diethylene glycol alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts, Waste Polyester
Containing polyurethane in textile raw material, enter screw extruder blended melting in raw material addition raw materials quality 1～8% diethylene glycol and squeeze
Going out, the melt viscosity of screw extruder melt out is 0.40～0.50dl/g, and then material enters that quenched tune is adhesive-assembly puts, and adjusts
Matter adjusts the melt viscosity of the adhesive-assembly melt putting out to be 0.635dl/g～0.685dl/g.
As improving further, the addition of described diethylene glycol is the 3～6% of raw materials quality.
The metering device of the addition of diethylene glycol is special diethylene glycol pump, and the diethylene glycol after metering is noted by pipe special
Enter the center of screw feed mouth, under screw rod and high temperature dual function, be mutually mixed diethylene glycol between foam material spread rapidly,
Melt zone and mixed segment diethylene glycol in screw rod rotation are sufficiently mixed with melt under the effect of shearing force and frictional force and gradually open
Beginning alcoholysis.
As improving further, the temperature 275 of described screw extruder～300 DEG C, when the stop of screw extruder
Between be 10～20min.
As further improving, described screw extruder Luo mono-district to ten district's temperature be followed successively by 278 DEG C, 280 DEG C,
285℃、290℃、295℃、290℃、290℃、288℃、288℃、286℃。
As improving further, described screw extruder melt out first passes through filter, and to enter back into quenched tune adhesive-assembly
Put, the temperature 280 of filter～295 DEG C.
As improving further, adhesive-assembly the putting of described quenched tune includes interconnective vertical vacuum separating still and horizontal tune
Matter adjusts viscous still, is from top to bottom provided with multi-layer porous plate in vertical vacuum knockout tower, and the bottom that horizontal quenched tune glues still is provided with
It is 280～295 DEG C that augering screw, vertical vacuum knockout tower and horizontal quenched tune glue the temperature of still, vertical vacuum knockout tower true
Reciprocal of duty cycle is 250pa～150Pa, and it is 100Pa～30Pa that horizontal quenched tune glues the vacuum of still, quenched tune is adhesive-assembly put in stop time
Between be 30min～120min；As preferably, the vacuum of vertical vacuum knockout tower is 250pa～160Pa, and horizontal quenched tune glues
The vacuum of still is 80Pa～40Pa, quenched tune is adhesive-assembly put in the time of staying be 60min～90min.
As improving further, described raw material is become foam material by Waste Polyester textile.As further improving, method bag
Include following in step: Waste Polyester textile carries out sorting, enters after broken or cutting the foam material machine of high speed rotating, foam material machine
Temperature is 150～170 DEG C, through stirring, the mixing of 3min～6min, adds appropriate water and drastically lowers the temperature and make its molding, thus
Prepare foam material.
As preferably, described Waste Polyester textile selects polyester-containing textiles leftover pieces, Waste Polyester clothing, non-woven polyester system
The mixing of one or more in product.
For the viscosity differences of viscosity, aberration difference etc. between homogeneous raw material impurity content difference, batch as far as possible, raw material exists
Use in the demand needing to meet continuous and stable production through allotment.As improving further, described raw material≤-
Under the conditions of 0.96MPa vacuum and temperature 145 DEG C ± 5 DEG C, Rotary drying 8h～10h, the most aqueous≤120PPm put into Screw Extrusion
Machine.
The method of the present invention is by mixing proper amount of diethylene glycol in the melt, it is achieved spandex (polyurethane) is high temperature (285 DEG C
± 10 DEG C), quick alcoholysis under high pressure (5MPa ± 0.5MPa), the regular strand that can effectively reduce spandex (polyurethane) is deposited
In the impact on polyester fondant each side.But due to, the existence of diethylene glycol itself also has certain alcoholysis effect to polyester, and
This alcoholysis is then of value to opening of polyester group (carboxyl and hydroxyl), for occurring polyreaction to provide condition, after alcoholysis
The intrinsic viscosity of melt under the same conditions has the raising of 0.08～0.15, reaches or glues close to polyester slice characteristic after melted
Degree.The oleophylic aqueous of the polyester after spandex alcoholysis can improve, and fiber spinnability improves, and the quality of product is effectively improved.
The present invention has from screw extruder melt out because of alcoholysis effect, the viscosity of melt compared with the direct melt viscosity of foam material
The viscosity drop of 0.06dl/g～0.15dl/g, the melt final viscosity after alcoholysis is less than 0.49dl/g.Foam material relatively directly melts
Melt the viscosity of more than the 0.54dl/g obtained, being greatly enhanced of the mobility of melt.When melt is through filter
Owing to the mechanical admixture in preferable fluidity of molten melt is filtered, filter also acts as good immixture simultaneously,
While filtration, alcoholysis degree is further.During by the speed scalable melt stop in melt pipe that adjusts screw rod
Between, the time that generally changes is 10min～20min.
After the polyester fondant of alcoholysis, enter that quenched tune is adhesive-assembly to be put, under vacuum, the low molecule that alcoholysis produces
The lower-molecular substances such as the dyestuff that contains in material, foam material self, slurry, oil preparation are waved the most together and are taken off, and the degree of purity of melt obtains
To further improving.The appropriate functional group (hydroxyl, carboxyl) that alcoholysis stage produces simultaneously is also less than the true of 500Pa in vacuum
Start polycondensation under empty condition, by regulation quenched tune is adhesive-assembly put in the perforated plate construction of vertical vacuum separation still and horizontal quenched tune
The rotary speed adjustable melt of the mouse cage of viscous still is in the time of staying in this stage, and generally this process continues 30min～120min.
By above-mentioned technique and flow process, the final spinning melt obtaining high-quality.
The profitable effect of the present invention is the following aspects:
1) energy-saving and cost-reducing: the method is by adding diethylene glycol, and after the viscosity of melt reduces, melt flowability obtains very
Big improvement, mechanical admixture in melt filter more thoroughly, filter use cycle stretch-out more than 1.5 times, the adding of screw rod
Thermal power and power of motor reduce more than 15%, have saved substantial amounts of energy consumption.
2) lower-molecular substance evaporated during the quenched tune of liquid phase is viscous and the diethylene glycol of a small amount of residual have well
Mobility, solves pipeline between cyclone separator pipeline and the reactor that conventional foam material occurs during quenched tune is viscous and easily blocks up
Plug and the problem of the easy coking of steam jet pump condenser.
3) primary quality measure of the melt obtained: intrinsic viscosity 0.635dl/g～0.685dl/g, viscosity reaches fiber
The level of grade pet chip.
4) the method the most effectively eliminates in melt the impurity such as the part pigment of residual, slurry, plasticizer to the most in addition
The impact of whole melt quality.
5) regularity of spandex (polyurethane) strand is destroyed, and the parent of polyester fondant aqueous again is volatilized, fiber
Spinnability improve, the coherent of fiber improved.
Detailed description of the invention:
Below by the carrying with the spandex (polyurethane) contained the present invention of the specific embodiment under different technology conditions
The method of high Pillar recovery spinnability is further described.In following example, quenched tune is adhesive-assembly is set to vertical sleeping united reaction
Kettle device.
By the Waste Polyester textile foam material containing spandex (the quality Bulbus Lilii ratio accounting for foam material is 10～15%) according to 50%
Adding proportion is blended in conventional Waste Polyester textile foam material, then compounding according to foam material impurity content, color, viscosity differences etc.
After Hao, under the conditions of certain vacuum (≤-0.96MPa) and temperature (145 DEG C ± 5 DEG C), Rotary drying 9h, final aqueous 110PPm throw
Enter spinning feed bin.The speed of regulation alcohol pump makes mass fraction is foam material the 3% of its diethylene glycol measured, screw feed amount
1t/h, spiral shell one district to ten district's temperature be followed successively by 278 DEG C, 280 DEG C, 285 DEG C, 290 DEG C, 295 DEG C, 290 DEG C, 290 DEG C, 288 DEG C,
288 DEG C, 286 DEG C, filter temperature 288 DEG C, the melt time of staying in screw rod, filter and pipeline is 15min.Enter liquid
Mutually quenched tune glues setup time altogether 70min, the vacuum of vertical retort and horizontal retort be respectively 250pa～160Pa and 80Pa～
40Pa, still temperature is 288 DEG C.Then, the melt of acquisition is carried out Direct-spinning of PET Fiber, it is thus achieved that polyester staple fibers.Conclusion such as table 1 below:
Table 1, different material and process data are to comparing
Embodiment 4:
By the Waste Polyester textile foam material containing spandex (the quality Bulbus Lilii ratio accounting for foam material is 10～15%) according to 30%
Adding proportion is blended in conventional Waste Polyester textile foam material, then compounding according to foam material impurity content, color, viscosity differences etc.
After Hao, under the conditions of certain vacuum (≤-0.96MPa) and temperature (145 DEG C ± 5 DEG C), Rotary drying 9h, final aqueous 100PPm throw
Enter spinning feed bin.The speed of regulation alcohol pump makes mass fraction is foam material the 4% of its diethylene glycol measured, screw feed amount
1t/h, spiral shell one district to ten district's temperature be followed successively by 278 DEG C, 280 DEG C, 285 DEG C, 290 DEG C, 295 DEG C, 290 DEG C, 290 DEG C, 288 DEG C,
288 DEG C, 286 DEG C, filter temperature 288 DEG C, the melt time of staying in screw rod, filter and pipeline is 16min.Enter liquid
Mutually quenched tune glues setup time altogether 75min, the vacuum of vertical retort and horizontal retort be respectively 200pa～150Pa and 60Pa～
30Pa, still temperature is 286 DEG C.Then, the melt of acquisition is carried out Direct-spinning of PET Fiber, it is thus achieved that polyester staple fibers.Conclusion such as table 2 below:
Table 2, different material and process data are to comparing
Claims (10)
1. the polyurethane that diethylene glycol alcoholysis contains in removing Waste Polyester textile is for the method for polyester spinning melts, and its feature exists
Containing polyurethane in Waste Polyester textile raw material, add raw materials quality 1 ~ 8% diethylene glycol entrance screw extruder at raw material and be blended
Melt extruding, the melt viscosity of screw extruder melt out is 0.40 ~ 0.50dl/g, and then the quenched tune of material entrance is adhesive-assembly
Putting, the melt viscosity of the adhesive-assembly melt putting out of quenched tune is 0.635dl/g～0.685dl/g.
Diethylene glycol alcoholysis the most according to claim 1 removes the polyurethane contained in Waste Polyester textile for Direct-spinning of PET Fiber
The method of melt, it is characterised in that: the addition of diethylene glycol is the 3 ~ 6% of raw materials quality.
Diethylene glycol alcoholysis the most according to claim 1 and 2 removes the polyurethane contained in Waste Polyester textile for polyester
The method of spinning melt, it is characterised in that: the temperature of screw extruder 275 ~ 300 DEG C, in the time of staying of screw extruder be
10~20min。
Diethylene glycol alcoholysis the most according to claim 3 removes the polyurethane contained in Waste Polyester textile for Direct-spinning of PET Fiber
The method of melt, it is characterised in that: screw extruder Luo mono-district to ten district's temperature be followed successively by 278 DEG C, 280 DEG C, 285 DEG C, 290
℃、295℃、290℃、290℃、288℃、288℃、286℃。
Diethylene glycol alcoholysis the most according to claim 1 removes the polyurethane contained in Waste Polyester textile for Direct-spinning of PET Fiber
The method of melt, it is characterised in that: screw extruder melt out first passes through filter and enters back into that quenched tune is adhesive-assembly to be put, and filters
The temperature of device 280 ~ 295 DEG C.
Diethylene glycol alcoholysis the most according to claim 1 and 2 removes the polyurethane contained in Waste Polyester textile for polyester
The method of spinning melt, it is characterised in that: quenched tune is adhesive-assembly to be put and includes interconnective vertical vacuum separating still and horizontal quenched
Adjusting viscous still, be from top to bottom provided with multi-layer porous plate in vertical vacuum knockout tower, the bottom that horizontal quenched tune glues still is provided with and pushes away
Enter screw rod, vertical vacuum knockout tower and horizontal quenched tune gluing the temperature of still is 280 ~ 295 DEG C, the vacuum of vertical vacuum knockout tower
For 250pa～150Pa, it is 100Pa～30Pa that horizontal quenched tune glues the vacuum of still, quenched tune is adhesive-assembly put in the time of staying be
30min~120min；As preferably, the vacuum of vertical vacuum knockout tower is 250pa～160Pa, and horizontal quenched tune glues the true of still
Reciprocal of duty cycle is 80Pa～40Pa, quenched tune is adhesive-assembly put in the time of staying be 60min～90min.
Diethylene glycol alcoholysis the most according to claim 1 removes the polyurethane contained in Waste Polyester textile for Direct-spinning of PET Fiber
The method of melt, it is characterised in that: Waste Polyester textile raw material select polyester-containing textiles leftover pieces, Waste Polyester clothing, polyester without
The mixing of one or more in spun articles.
8. remove the polyurethane contained in Waste Polyester textile according to the diethylene glycol alcoholysis described in claim 1 or 2 or 7 standby poly-
The method of ester spinning melt, it is characterised in that: raw material is become foam material by Waste Polyester textile.
Diethylene glycol alcoholysis the most according to claim 8 removes the polyurethane contained in Waste Polyester textile for Direct-spinning of PET Fiber
The method of melt, it is characterised in that: Waste Polyester textile raw material carries out sorting, crushing or enter after cutting the bubble of high speed rotating
Material machine, foam material machine temperature is 150 ~ 170 DEG C, through stirring, the mixing of 3min～6min, adds appropriate water and drastically lowers the temperature and make it
Molding, thus prepare foam material.
Diethylene glycol alcoholysis the most according to claim 8 is removed the polyurethane contained in Waste Polyester textile and is spun for polyester
The method of silk melt, it is characterised in that: raw material is made after foam material under the conditions of≤-0.96MPa vacuum and temperature 145 DEG C ± 5 DEG C
Rotary drying 8h～10h, the most aqueous≤120PPm put into screw extruder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016159A (en) * | 2021-11-15 | 2022-02-08 | 扬州天富龙科技纤维有限公司 | Dacron foam spinning deep-color fine-denier polyester staple fiber containing spandex and preparation method thereof |
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| CN114016159A (en) * | 2021-11-15 | 2022-02-08 | 扬州天富龙科技纤维有限公司 | Dacron foam spinning deep-color fine-denier polyester staple fiber containing spandex and preparation method thereof |
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