CN106279755A - The polyurethane contained in alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts - Google Patents
The polyurethane contained in alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts Download PDFInfo
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- CN106279755A CN106279755A CN201610670556.0A CN201610670556A CN106279755A CN 106279755 A CN106279755 A CN 106279755A CN 201610670556 A CN201610670556 A CN 201610670556A CN 106279755 A CN106279755 A CN 106279755A
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- Prior art keywords
- alcoholysis
- polyester
- waste polyester
- polyurethane
- melt
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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 alcoholysis and remove the polyurethane that contains in the Waste Polyester textile method for polyester spinning melts.The polyurethane contained in a kind of alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts, containing polyurethane in Waste Polyester textile raw material, add raw materials quality 1 ~ 8% alcohol 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 is by the way of alcoholysis thus reduces spandex (polyurethane) and exists 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 alcoholysis and remove Waste Polyester weaving
The polyurethane contained in product 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 alcoholysis and remove the polyurethane contained in Waste Polyester textile for polyester
The method of spinning melt, the method uses the mode adding appropriate alcohol in Waste Polyester textile, interrupts by the way of alcoholysis
The strand of polyurethane (spandex), thus reach to solve the purpose of polyurethane (spandex).Polyurethane (spandex) strand destroys
After, short chain material therein the most most volatilizable out, thus reduce spandex (polyurethane) exist right
The saturated performance of polyester melt viscosity, mobile performance, fiber and drawing-off performance and vacuum pipe and the susceptible to plugging system of tubular heat exchanger
The impact of row problem.
For achieving the above object, present invention employs following technical scheme:
The polyurethane contained in alcoholysis removal Waste Polyester textile is for the method for polyester spinning melts, Waste Polyester textile
Containing polyurethane in raw material, adding raw materials quality 1～8% alcohol at raw material, the described alcohol described in alcohol selection selects methanol, second
The mixing of one or more in alcohol, ethylene glycol, 1.4 butanediols, diethylene glycol and 2,2'-ethylenedioxybis(ethanol)., is blended subsequently into screw extruder
Melt extruding, the melt viscosity of screw extruder melt out is 0.40～0.50dl/g, and then the quenched tune of material entrance glues
Device, the melt viscosity of the adhesive-assembly melt putting out of quenched tune is 0.635dl/g～0.685dl/g.
As improving further, the addition of described alcohol is the 3～6% of raw materials quality.
The metering device of the addition of alcohol is special alcohol pump, and the alcohol after metering injects screw feed mouth by pipe special
Center, under screw rod and high temperature dual function, be mutually mixed alcohol between foam material spread rapidly, screw rod rotate melted
Section and mixed segment alcohol are sufficiently mixed with melt under the effect of shearing force and frictional force and gradually start 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 alcohol in the melt), it is achieved spandex (polyurethane) 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) exists
Impact on polyester fondant each side.But due to, the existence of alcohol itself also has certain alcoholysis effect to polyester, and this alcoholysis
Then be of value to opening of polyester group (carboxyl and hydroxyl), for occur polyreaction provide condition, by after alcoholysis identical
Under the conditions of the intrinsic viscosity of melt have the raising of 0.08～0.15, reach or close to polyester slice intrinsic viscosity after melted.Ammonia
The oleophylic aqueous of the polyester after synthetic fibre 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 alcohol, and after the viscosity of melt reduces, melt flowability obtains the biggest
Improve, mechanical admixture in melt filter more thoroughly, filter use cycle stretch-out more than 1.5 times, screw rod add hot merit
Rate 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 alcohol of a small amount of residual have well flowing
Property, solve pipeline between cyclone separator pipeline and the reactor that conventional foam material occurs during quenched tune is viscous easily block 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.
Embodiment 1:
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 eg pump makes mass fraction is foam material the 3% of its ethylene 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 2:
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 eg pump makes mass fraction is foam material the 4% of its ethylene 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
Embodiment 3:
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 3 below:
Table 3, 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 4 below:
Table 4, different material and process data are to comparing
Claims (10)
1. the polyurethane that alcoholysis contains in removing Waste Polyester textile is for the method for polyester spinning melts, it is characterised in that useless poly-
Containing polyurethane in ester textile raw material, adding raw materials quality 1 ~ 8% alcohol at raw material, first selected by the described alcohol described in alcohol selection
The mixing of one or more in alcohol, ethanol, ethylene glycol, 1.4 butanediols, diethylene glycol and 2,2'-ethylenedioxybis(ethanol)., subsequently into Screw Extrusion
Machine blended melting is extruded, and the melt viscosity of screw extruder melt out is 0.40 ~ 0.50dl/g, and then material enters quenched
Adjusting adhesive-assembly putting, the melt viscosity of the adhesive-assembly melt putting out of quenched tune is 0.635dl/g～0.685dl/g.
Alcoholysis the most according to claim 1 removes the polyurethane contained in Waste Polyester textile for polyester spinning melts
Method, it is characterised in that: the addition of alcohol is the 3 ~ 6% of raw materials quality.
Alcoholysis the most according to claim 1 and 2 is removed the polyurethane contained in Waste Polyester textile and is melted for Direct-spinning of PET Fiber
The method of body, it is characterised in that: the temperature of screw extruder 275 ~ 300 DEG C, the time of staying of screw extruder be 10 ~
20min。
Alcoholysis the most according to claim 3 removes the polyurethane contained in Waste Polyester textile for polyester spinning melts
Method, 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 DEG C, 295
℃、290℃、290℃、288℃、288℃、286℃。
Alcoholysis the most according to claim 1 removes the polyurethane contained in Waste Polyester textile for polyester spinning melts
Method, 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, the temperature of filter
Spend 280 ~ 295 DEG C.
Alcoholysis the most according to claim 1 and 2 is removed the polyurethane contained in Waste Polyester textile and is melted for Direct-spinning of PET Fiber
The method of body, it is characterised in that: adhesive-assembly the putting of quenched tune includes that interconnective vertical vacuum separating still and horizontal quenched tune glue still,
From top to bottom being provided with multi-layer porous plate in vertical vacuum knockout tower, the bottom that horizontal quenched tune glues still is provided with augering screw,
It is 280 ~ 295 DEG C that vertical vacuum knockout tower and horizontal quenched tune glue the temperature of still, and the vacuum of vertical vacuum knockout tower is 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 vacuum of still and is
80Pa～40Pa, quenched tune is adhesive-assembly put in the time of staying be 60min～90min.
Alcoholysis the most according to claim 1 removes the polyurethane contained in Waste Polyester textile for polyester spinning melts
Method, it is characterised in that: Waste Polyester textile raw material selects polyester-containing textiles leftover pieces, Waste Polyester clothing, non-woven polyester goods
In the mixing of one or more.
8. remove the polyurethane contained in Waste Polyester textile for Direct-spinning of PET Fiber according to the alcoholysis described in claim 1 or 2 or 7
The method of melt, it is characterised in that: raw material is become foam material by Waste Polyester textile.
Alcoholysis the most according to claim 8 removes the polyurethane contained in Waste Polyester textile for polyester spinning melts
Method, it is characterised in that: Waste Polyester textile raw material carries out sorting, crushing or enter after 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.
Alcoholysis the most according to claim 8 removes the polyurethane contained in Waste Polyester textile for polyester spinning melts
Method, it is characterised in that: raw material make rotate under the conditions of≤-0.96MPa vacuum and temperature 145 DEG C ± 5 DEG C after foam material dry
Dry 8h～10h, the most aqueous≤120PPm put into screw extruder.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112313054A (en) * | 2018-07-03 | 2021-02-02 | 下一代回收机有限公司 | Method for producing a polycondensate melt from a primary material and a secondary material |
| WO2023044699A1 (en) * | 2021-09-24 | 2023-03-30 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Textile seperation methods |
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| CN1413178A (en) * | 1999-10-22 | 2003-04-23 | 帝人株式会社 | Method for separating and recovering dimethyl terephthalate and ethylene glycol from polyester waste |
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| WO2023044699A1 (en) * | 2021-09-24 | 2023-03-30 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Textile seperation methods |
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