CN103264453A - Thermoplastic polyurethane elastomer production device and method - Google Patents
Thermoplastic polyurethane elastomer production device and method Download PDFInfo
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- CN103264453A CN103264453A CN201310185993XA CN201310185993A CN103264453A CN 103264453 A CN103264453 A CN 103264453A CN 201310185993X A CN201310185993X A CN 201310185993XA CN 201310185993 A CN201310185993 A CN 201310185993A CN 103264453 A CN103264453 A CN 103264453A
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- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
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- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Abstract
The invention discloses a thermoplastic polyurethane elastomer production device which comprises a twin-screw extruder, an in-water pelletizer, a dehydrator, a vibration screen, a packing machine and a material cabin, wherein the in-water pelletizer is connected to the rear end of the twin-screw extruder; the dehydrator is connected with the in-water pelletizer; the vibration screen is connected with the dehydrator; a discharging port is arranged at the lower part of the vibration screen; the packing machine is connected with the vibration screen; and the material cabin is connected with the packing machine. The thermoplastic polyurethane elastomer production device is characterized in that three liquid material tanks are directly connected to the front end of the twin-screw extruder; raw material measuring members are arranged at the upper parts of the liquid material tanks; and at least twelve raw material continuous reaction stations on which the liquid materials are sufficiently reacted are arranged at the front part of the twin-screw extruder. The ratio of raw materials of the device is controllable, the raw materials are sufficiently reacted, the working efficiency is high, the occupied space is small, and the environmental pollution is greatly reduced.
Description
Technical field
The present invention relates to a kind of polymer production device, relate in particular to a kind of TPUE (TPU) process units and method.
Background technology
TPU is by soft section linear block copolymers that constitutes with vulcabond, the hard section of chain extender of oligomer polyol.TPU be by '-diphenylmethane diisocyanate (MDI) or toluene di-isocyanate(TDI) vulcabond quasi-molecules such as (TDI) and macromolecular polyol (POLYOL), low molecular polylol (chain extender) common in bottler placer and double screw extruder continuously complete reaction be polymerized and the macromolecular material of granulation in water.It is feature to repeat carbamate groups in molecular composition, contains urea carbamate, biuret, and other groups such as ester bond, ehter bond simultaneously.From molecular structure, alternately constituted by rigid chain segment and soft segment, wherein rigid chain segment is to be obtained by vulcabond and chain extender reaction, soft segment is then obtained by vulcabond and macromolecular polyol reaction.It is similar with other thermoplastic, have caoutchouc elasticity and plastic properties under the room temperature, can be melt into rheid under the high temperature, can be processed by injection machine (as extrude, inject, calendering etc.), need not mixing and aftertreatment technology such as sulfuration grade, but conserve energy, but the recyclable recycling of goods and its discarded after natural decomposition, generally belong to environment-friendly materials by comparison with plastics (PVC) with general.
TPU is heating plasticization, the soluble polyurethane elastomer of solvent, and it has the performance of various excellences.It has excellent toughness, and abrasion performance and tearing property, high ventilation the character also utmost point are suitable for chemicals, oil product container.TPU has wide range of applications, the consumption sustainable growth, but because the particularity of polymer itself, the uniformity of proportion of raw materials accuracy, mixing and the control of the temperature in the production process all can influence the physical property of the product of TPU, thereby generation quality fluctuation, this quality fluctuation bring adverse effect can for downstream client's use.For TPU, the downstream client mainly be reel off raw silk from cocoons, membrane, injection moulding because quality fluctuation bring for the downstream client and produce unstable, problems such as membrane is inhomogeneous, it is easily broken to reel off raw silk from cocoons, injection moulding object intensity instability.In addition, present many industries need compound TPU, and therefore, TPU producer need produce modified TPU.
Production for TPU, tradition TPU granulation generally was divided into for two steps, the first step at first is heated to uniform temperature with BDO (dihydroxy butane), PEPA and pure MDI ('-diphenylmethane diisocyanate), hybrid reaction by a certain percentage becomes block by pallet or other mould moldings then again.Second step was to get final product by the extruder granulating and forming by the crusher in crushing frustillatum through the slaking of certain hour temperature again.But it is big to become the material piece to pollute by pallet or other mould moldings, and production efficiency is low, the energy consumption height, and environmental pollution is serious, the cost height.Best method is that one-step method is produced TPU with double screw extruder.
For the TPU that one-step method makes, be to belong to a kind of block linear polymer basically, adopt double screw extruder synthetic TPU continuously, its processing step is made up of raw material preparation, metering conveying, hybrid reaction, four parts of extruding pelletization.This technology have raw material proportioning metering accurately, mix, characteristics such as reaction temperature homogeneous and material time of staying in machine are even.But it is in the technological process, all very important to precision, conveying, Temperature Distribution and the pelletizing technology of the control of raw material moisture, metering.As required, by the adjustment of prescription, can design the TPU product with suitable performance indications.Therefore, in the TPU production process, the proportioning of material composition, the uniformity of mixing, the control of reaction temperature all is and part and parcel, but, all there is the manual proportioning metering of raw material inaccuracy in present TPU one step granulating system, mix inhomogeneous, problems such as reaction temperature is uncontrollable, and thereby two traditional step granulating systems exist the processing technology preparation flow long owing to needed for two steps made on the one hand, the problem that energy consumption is high, the energy consumption height has caused environmental pollution serious on the other hand, the problem that cost is high, therefore, for the TPU product that output accords with the demands of the market, it is accurate to be badly in need of developing a kind of raw material proportioning, mix, reaction temperature is controlled and preparation flow is simple, cost is low, energy consumption is low, reduce the TPU one-step method granulating system of environmental pollution.
Summary of the invention
The object of the present invention is to provide the metering of a kind of raw material proportioning accurately, mix, reaction temperature is controlled and do not use pallet or other moulds, preparation flow is simple, cost is low, energy consumption is low, free of contamination TPUE process units.
A kind of TPUE process units; comprise: double screw extruder; with comminutor in the water that described double screw extruder rear end is connected; the dewaterer that is connected with comminutor in the described water; the bottom that is connected with described dewaterer is provided with the vibratory sieve of discharge port; be arranged at the packing machine of described vibratory sieve below; the feed bin that is connected with described packing machine; it is characterized in that: described double screw extruder front end directly is connected with three liquid tanks; described liquid tank top is provided with the raw material metering unit of control raw material supplying amount; the front portion of described double screw extruder is provided with at least ten two separate raw material successive reaction stations that the liquid material is fully reacted, and raw material enters into described at least ten two separate raw material successive reaction stations respectively successively.
Preferably, described three liquid tanks are polyalcohol batch can, polyisocyanates batch can and butanediol batch can.
Preferably, the raw material metering unit of described three liquid tanks is provided with measuring pump, links to each other with described measuring pump and controls the mass flowmenter of its flow, and link to each other with described mass flowmenter and control the servo governor of its flow; Described servo governor, mass flowmenter and measuring pump are controlled automatically by computer.
Preferably, described TPU granulating system also comprises the single screw pelletizer that is connected with the double screw extruder posterior segment, and described single screw pelletizer is provided with coupled powder electronic weighing balance.
Preferably, be connected by a material grain conveyance conduit between comminutor and described dewaterer and described packing machine and the described feed bin in the described water.
A kind of TPU prilling process that utilizes above-mentioned TPUE process units to carry out granulation, it may further comprise the steps:
1, polyalcohol, polyisocyanates and butanediol are injected corresponding polyalcohol batch can, polyisocyanates batch can and butanediol batch can respectively;
2, the ratio of each raw material is set in computer, utilize the servo governor separately of the raw material metering unit of each liquid tank to control the flow that corresponding mass flowmenter is controlled raw material, thereby control the output flow of measuring pump separately, thereby change different blended indexs;
3, the mass flowmenter of measurement unit detects, proofreaies and correct to realize adjusting and the control of component flow respectively to three component flow parameters and mixing ratio parameter separately;
4, the three part material components of metering after finishing under certain reaction temperature at least ten two separate raw material successive reaction stations hybrid reaction continuously successively;
5, after double screw extruder is extruded the raw material that combines, comminutor granulation in water;
6, the polymer extruded of double screw extruder increases performance parameter or adds corresponding raw material to obtain compound TPU by single screw pelletizer;
7, the TPU that finishes of granulation enters dewaterer by a material grain conveyance conduit and dewaters, and enters the vibrating bin drying by a material grain conveyance conduit, and enters the packing machine packing, and packing is finished the laggard feed bin of going into.
Beneficial effect of the present invention has:
1, owing to adopt double screw extruder one step granulation, reduces cost, reduced energy consumption.
2, utilize computer control, the mass flowmenter of the raw material metering unit separately by each liquid tank detects, proofreaies and correct to realize adjusting and the control of component flow respectively to three component flow parameters and mixing ratio parameter, improved the metering precision of raw material proportioning.
3, the setting of at least ten two raw material successive reaction stations has increased reaction time of raw material, can make the abundant hybrid reaction of raw material.
4, do not use mould, pallet granulation not only to reduce environmental pollution, and reduced the floor space of TPU comminutor, improved the whole utilization rate of factory, and reduced working strength of workers, can bring bigger economic benefit for factory.
5, cooperate double screw extruder by single screw rod, improved stability and the easier processing plyability TPU of TPU.
Description of drawings
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is the process chart of another embodiment of the present invention;
Fig. 3 is raw material metering unit enlarged diagram in the liquid tank of the present invention;
Shown in coordinate system among the figure, the X-axis positive direction is top or top, and the Y-axis positive direction is right-hand or right part, and Z axle positive direction is the place ahead or front portion, and is same, the opposite direction correspondence of X-axis, Y-axis and Z axle be below or bottom, left or left part and rear or rear portion.
The specific embodiment
The TPUE process units; comprise: double screw extruder 1; be arranged on double screw extruder 1 rearward end and by comminutor 2 in material grain conveyance conduit 100 and the water that double screw extruder 1 is connected; the dewaterer 3 that is connected with comminutor in the water 2; be provided with the vibratory sieve 4 of discharge port with the bottom that dewaterer 3 is connected by material grain conveyance conduit 100; be arranged on the packing machine 5 of vibratory sieve 4 belows; with the feed bin 6 of packing machine 5 by expecting that grain conveyance conduit 100 is connected; double screw extruder 1 front end directly is connected with three liquid tanks 71; 72; 73; described liquid tank top is provided with the raw material metering unit 70 of control raw material reaction amount; the front portion of double screw extruder 1 is provided with at least ten two separate raw material successive reaction stations 10 that the liquid material is fully reacted, and raw material enters at least ten two raw material successive reaction stations 10 respectively successively.
Preferably, three liquid tanks are polyalcohol batch can 71, polyisocyanates batch can 72 and butanediol batch can 73.
Preferably, the raw material metering unit 70 of described three liquid tanks is provided with measuring pump 701, links to each other with measuring pump 701 and controls the mass flowmenter 702 of its flow, and link to each other with mass flowmenter 702 and control the servo governor 703 of its flow; Servo governor 701, mass flowmenter 702, measuring pump 703 are controlled automatically by computer.
Preferably, the TPUE process units also comprises the single screw pelletizer 8 that is connected with double screw extruder 1 posterior segment, and single screw pelletizer 8 is provided with coupled powder electronic weighing balance 80.
Preferably, comminutor 2 and dewaterer 3 in the water are connected by a material conveyance conduit 100 between the dewaterer 3 and vibratory sieve 4, packing machine 5 and feed bin 6.
Utilize the TPU prilling process of above-mentioned TPUE process units, it may further comprise the steps:
1, polyalcohol, polyisocyanates and butanediol are injected corresponding polyalcohol batch can 71, polyisocyanates batch can 72 and butanediol batch can 73 respectively.
2, the ratio of each raw material is set in computer, preferably, polyalcohol, the consumption of polyisocyanates and each component of butanediol is respectively 100 parts, 35-50 part and 8-13 part (every part unit is identical), for example three raw material consumption part ratios can be set to 100: 35: 8, utilize the servo governor separately 701 of the raw material metering unit 70 of each liquid tank to control the flow that corresponding mass flowmenter 702 is controlled raw materials, thereby control the output flow of measuring pump 703 separately, thereby change blended index to the ratio of in computer, setting, reach polyalcohol, polyisocyanates and butanediol consumption part ratio are 100: 35: 8.
3, the mass flowmenter 702 of measurement unit detects, proofreaies and correct to realize adjusting and the control of component flow respectively to three component flow parameters and mixing ratio parameter separately, to reach consumption purpose accurately.
Also can in computer, polyalcohol, polyisocyanates and butanediol ratio be set to 100: 50: 13 in another embodiment, to obtain the TPU of other performances, same, utilize the servo governor separately 701 of the raw material metering unit 70 of each liquid tank to control the flow that corresponding mass flowmenter 702 is controlled raw materials, thereby control the output flow of measuring pump 703 separately, thereby change blended index to the ratio of setting in computer, reaching polyalcohol, polyisocyanates and butanediol usage ratio is 100: 50: 13.
4, the three part material components of metering after finishing under certain reaction temperature at least ten two raw material successive reaction stations 10 hybrid reaction.
5, after 1 pair of raw material that combines of double screw extruder is extruded, comminutor 2 granulations in water.
6, the polymer extruded of double screw extruder 1 increases performance parameters or adds corresponding raw material to obtain compound TPU by single screw pelletizer 8.
7, the TPU that finishes of granulation enters dewaterer 3 by a material grain conveyance conduit and dewaters, and enters vibratory sieve 4 dryings by a material grain conveyance conduit, and enters packing machine 5 packings, and packing is finished the laggard feed bin 6 of going into.
In process of production, carry out the pyroreaction polymerization by raw material being placed double screw extruder 1, two screw rods of double screw extruder 1 relative motion have the high shear rates gradient can make the good hybrid reaction of material even.The front end of double screw extruder 1 is provided with at least ten two raw material successive reaction stations 10, and the raw material that metering is finished is abundant polymerisation at least ten two raw material successive reaction stations 10 at a certain temperature.
As a kind of preferred, liquid tank 71,72,73 places that double screw extruder 1 connects also are provided with raw material metering unit 70, and this raw material metering unit 70 comprises servo governor 701, mass flowmenter 702 and measuring pump 703.The work of servo governor 701, mass flowmenter 702 and measuring pump 703 is by computer control, by the ratio of polyalcohol, polyisocyanates and butanediol is set in computer, utilize the flow of mass flowmenter 702 of servo governor 701 each metering units of control of the raw material metering unit 70 that each material irritates, control the output flow of corresponding measuring pump 703 separately by mass flowmenter 702, thereby change different blended indexs, produce the TPU of different performance, different use.
The mass flowmenter 702 of raw material measurement unit 70 detects, proofreaies and correct to realize adjusting and the control of component flow respectively to polyalcohol, polyisocyanates and three component flow parameters of butanediol and mixing ratio parameter separately.Thereby realize and control the accurate proportioning of the material of double screw extruder.Preferably, but its control mode is divided into open loop control and closed-loop control dual mode.
As a kind of preferred; this TPU granulating system also is provided with single screw pelletizer 8; these list screw pelletizer 8 front ends are provided with powder electronic weighing balance 80; after hybrid reaction at least ten two raw material successive reaction stations of raw material in double screw extruder 1; and after extruding by double screw extruder; can be by reaction in single screw pelletizer enhancing product performance, or by direct interpolation composite to reach the needs of making compound TPU.
Owing to adopt double screw extruder one step granulation, reduced cost, reduced energy consumption.The mass flowmenter 702 of measurement unit detects, proofreaies and correct to realize adjusting and the control of component flow respectively to three component flow parameters and mixing ratio parameter separately, has improved the metering precision of raw material proportioning.At least ten two raw material successive reaction stations 10 of double screw extruder 1 front end setting can make raw material fully reaction in double screw extruder 1, to obtain the TPU of function admirable.Do not use mould, pallet granulation not only to reduce environmental pollution, and reduced the floor space of TPU comminutor, improved the whole utilization rate of factory, and reduced working strength of workers, can bring bigger economic benefit for factory.Cooperate double screw extruder 1 by single screw pelletizer 8, improved stability and the easier processing plyability TPU of TPU.
Those skilled in the art can make replacement or modification to content of the present invention according to content disclosed by the invention and the art technology of grasping; but these replacements or modification should not be considered as breaking away from the present invention's design, and these replacements or modification are all in the claimed interest field of the present invention.
Claims (6)
1. TPUE process units; comprise: double screw extruder; with comminutor in the water that described double screw extruder rear end is connected; the dewaterer that is connected with comminutor in the described water; the bottom that is connected with described dewaterer is provided with the vibratory sieve of discharge port; be arranged at the packing machine of described vibratory sieve bottom; the feed bin that is connected with described packing machine; it is characterized in that: described double screw extruder front end directly is connected with three liquid tanks; described liquid tank top is provided with the raw material metering unit of control raw material supplying amount, and the front portion of described double screw extruder is provided with at least ten two raw material successive reaction stations that the liquid material is fully reacted.
2. a kind of TPUE process units according to claim 1, it is characterized in that: described three liquid tanks are polyalcohol batch can, polyisocyanates batch can and butanediol batch can.
3. a kind of TPUE process units according to claim 1 and 2, it is characterized in that: the raw material metering unit of described three liquid tanks is provided with measuring pump, link to each other with described measuring pump and control the mass flowmenter of its flow, and link to each other with described mass flowmenter and control the servo governor of its flow; Described servo governor, mass flowmenter and measuring pump are controlled automatically by computer.
4. a kind of TPUE process units according to claim 3; it is characterized in that: described TPUE granulating system also comprises the single screw pelletizer that is connected with described double screw extruder posterior segment, and described single screw pelletizer is provided with coupled powder electronic weighing balance.
5. a kind of TPUE process units according to claim 3 is characterized in that: be connected by a material grain conveyance conduit respectively between comminutor and described dewaterer and described packing machine and the described feed bin in the described water.
6. one kind is utilized the described a kind of TPUE process units of aforementioned arbitrary claim to carry out the TPU process for granulating, and it is characterized in that: described a kind of TPU prilling process may further comprise the steps:
(1) polyalcohol, polyisocyanates and butanediol are injected corresponding polyalcohol batch can, polyisocyanates batch can and butanediol batch can respectively;
(2) ratio of each raw material is set in computer, utilize the servo governor separately of the raw material metering unit of each liquid tank to control the flow that corresponding mass flowmenter is controlled raw material, thereby control the output flow of measuring pump separately, thereby change different blended indexs;
(3) mass flowmenter of measurement unit detects, proofreaies and correct to realize adjusting and the control of component flow respectively to three component flow parameters and mixing ratio parameter separately;
(4) the three part material components of metering after finishing under certain reaction temperature at least ten two separate raw material successive reaction stations hybrid reaction continuously successively;
(5) after double screw extruder is extruded the raw material that combines, comminutor granulation in water;
(6) polymer extruded of double screw extruder increases performance parameter or adds corresponding raw material to obtain compound TPU by single screw pelletizer;
(7) TPU that finishes of granulation enters dewaterer by a material grain conveyance conduit and dewaters, and enters the vibratory sieve drying by a material grain conveyance conduit then, and enters the packing machine packing, and packing is finished the laggard feed bin of going into.
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| CN201310185993XA CN103264453A (en) | 2013-05-20 | 2013-05-20 | Thermoplastic polyurethane elastomer production device and method |
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| CN201310185993XA CN103264453A (en) | 2013-05-20 | 2013-05-20 | Thermoplastic polyurethane elastomer production device and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104148342A (en) * | 2014-07-21 | 2014-11-19 | 江苏绿艳高分子材料有限公司 | TPU (thermal receiver unit) dehydrator |
| CN105647455A (en) * | 2015-12-31 | 2016-06-08 | 佛山市金银河智能装备股份有限公司 | Continuous and automatic production line of polyurethane adhesive and production method thereof |
| CN105751399A (en) * | 2014-12-15 | 2016-07-13 | 凯力实业股份有限公司 | Energy-saving carbon-reduction composite plastic particle manufacturing machine |
| CN106827570A (en) * | 2017-02-14 | 2017-06-13 | 江苏莘翔机电有限公司 | A kind of short route Lightweight high-strength composite material preparation method and device |
| CN107297837A (en) * | 2016-04-14 | 2017-10-27 | 江苏瑞美福实业有限公司 | A kind of polycaprolactam pelletizing and screening system |
| WO2019023841A1 (en) * | 2017-07-31 | 2019-02-07 | Dow Silicones Corporation | Process and apparatus to make liquid silicone rubber compositions |
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| WO2019023841A1 (en) * | 2017-07-31 | 2019-02-07 | Dow Silicones Corporation | Process and apparatus to make liquid silicone rubber compositions |
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Application publication date: 20130828 |