CN108638476A - A kind of method that double rank low sheraing parallel dual-screws continuously prepare high-performance plasticizing rubber powder - Google Patents
A kind of method that double rank low sheraing parallel dual-screws continuously prepare high-performance plasticizing rubber powder Download PDFInfo
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- CN108638476A CN108638476A CN201810286503.8A CN201810286503A CN108638476A CN 108638476 A CN108638476 A CN 108638476A CN 201810286503 A CN201810286503 A CN 201810286503A CN 108638476 A CN108638476 A CN 108638476A
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- China
- Prior art keywords
- rubber powder
- screw
- parallel dual
- plasticizing
- low sheraing
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Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 102
- 239000005060 rubber Substances 0.000 title claims abstract description 102
- 239000000843 powder Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000004902 Softening Agent Substances 0.000 claims abstract description 14
- 239000012190 activator Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 15
- PFRGXCVKLLPLIP-UHFFFAOYSA-N diallyl disulfide Chemical compound C=CCSSCC=C PFRGXCVKLLPLIP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 10
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000010237 hybrid technique Methods 0.000 claims description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 4
- GUUVPOWQJOLRAS-UHFFFAOYSA-N Diphenyl disulfide Chemical compound C=1C=CC=CC=1SSC1=CC=CC=C1 GUUVPOWQJOLRAS-UHFFFAOYSA-N 0.000 claims description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 239000011297 pine tar Substances 0.000 claims description 4
- 229940068124 pine tar Drugs 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 239000003784 tall oil Substances 0.000 claims description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- -1 amine compound Chemical class 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000010920 waste tyre Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 12
- 238000012546 transfer Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 230000008439 repair process Effects 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 239000004636 vulcanized rubber Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
-
- 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
-
- 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
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/682—Barrels or cylinders for twin screws
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/82—Cooling
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/84—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
- B29C48/85—Cooling
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L17/00—Compositions of reclaimed rubber
-
- 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
- C08J2317/00—Characterised by the use of reclaimed rubber
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
A method of it continuously preparing high-performance using double rank parallel dual-screws of low sheraing and is plasticized rubber powder, belong to field of cyclic utilization of waste rubber.Utilize two concatenated part intermeshing co-rotating twin-screws, it will be delivered to softening agent, the mixed uniformly rubber powder of activator in the first rank plasticizing parallel dual-screw extruding machine, the immixture of low sheraing screw rod is engaged using the good heat transfer and part of barrel and screw mandrel, complete the selective chain rupture of rubber powder, realize that rubber powder is rapidly and uniformly plasticized regenerative process, the high temperature rubber powder being plasticized vertically falls into second-order cooling parallel dual-screw, and the cooling transmission process of plasticizing rubber powder is completed also with the well-equipped heat-transfer effect of parallel dual-screw.The low sheraing of part intermeshing co-rotating twin-screw prevents plasticizing rubber powder to the viscous glutinous of screw rod, and it is enclosed oxygen isolation to have certain self-cleaning function, preparation process, and there is the plasticizing rubber powder of gained high mechanical property and low Mooney viscosity to rebound；Equipment safety is continuous and product quality stability is good.
Description
Technical field：
The present invention relates to a kind of double rank low sheraing parallel dual-screws continuously to prepare the device and technique that high-performance is plasticized rubber powder
Method belongs to field of cyclic utilization of waste rubber.
Background technology
China is always the consumption big country of rubber sources especially natural rubber, and depends on import for a long time, and same with this
When, the waste rubber goods amount based on tire is also incrementally increasing, and association's statistics is recycled according to Chinese tire, by 2015
The yield of China's waste and used rubber tyre is about 300,000,000, and weight closes 10,000,000 tons or more.How following for waste old is efficiently realized
Ring, which recycles, can greatly reduce China's rubber sources external dependence degree, while also have very great meaning to the protection of environment
Justice.
Currently, reclaimed rubber industry generally uses plasticizing apparatus of the dynamic devulcanizer (high temperature and high pressure method) as rubber powder, production
Process is discontinuous and can cause a large amount of secondary pollutions.In recent years, with the continuous reinforcement of country and Public environmental attitude, environmental law
Rule and measure constantly improve, Ministry of Industry and Information printed and distributed on July 18th, 2016《Key industry volatile organic matter emission reduction action meter
It draws》In, it emphasizes to execute thoroughly superseded conventional dynamic digester to reclaimed rubber industry before 2018, popularizes normal pressure continuous desulfurization in an all-round way
Production technology.Therefore, reclaimed rubber industry has been gradually introduced spiral or the closed continuous mode of production of screw, realizes pollution
The environmentally friendly scheme of the concentration emission treatment of object.
Rubber powder granule is delivered to twin-screw by Tao Guoliang etc. (101418082 A green desulfurization technique of waste rubber of CN)
In extruder, using the high temperature in the compression shear area of extruder, high pressure and shearing collective effect, realize the fracture of cross-bond to
Obtain plasticizing rubber powder.It is found by a large amount of literature survey, the coefficient of elasticity using S -- S, the bond energy of C-S keys and chemical bond is equal
It is lower than C-C key, heat chemistry effect or mechanical shearing can be used to realize that rubber powder disconnects S-S cross-bonds respectively, but be crosslinked
The quantity of key is considerably less compared to C-C keys on main chain, therefore too low by the selectivity of mechanical shearing disconnection cross-bond, and mistake
More backbone breakings will necessarily cause the decline for being plasticized rubber powder mechanical property, and the high pressure that secondly shear zone is formed reaches 20~
80MPa proposes very high requirement to the material of equipment and safety.
Zhang Xinghe (103601914 A of CN) completes plasticizing and the cooling procedure of rubber powder using 4 screws in parallel.
Rubber powder will have high molecular material peculiar elastic and sticky after plasticizing, and viscous response easily forms in the equipment such as spiral residual
Material, and then viscous stifled problem occurs, although in recent years, a kind of asynchronous rubber powder of Zheng Zuxiang etc. (103341921 A of CN) double helix connects
Continuous plasticizing apparatus) effectively improve the putty problem of spiral, but the material in spiral is due to no stronger squeezing action, thus
The thermal conduction effect of sizing material is undesirable, necessarily cause spiral rubber powder layer exist plasticizing it is uneven, be not plasticized rubber powder be difficult to by
Failure by shear and be present in reclaimed rubber with hard particles state, and then form stress concentration point and the mechanical property of sizing material be greatly reduced
Can, it is plasticized non-uniform rubber powder and equally also results in reclaimed rubber appearance largely Mooney viscosity rebound.
The continuous and environmentally friendly of rubber powder plasticizing process is although realized using spiral or screw extruder, and operating procedure is also simple
Single safety, but their current technology problems substantially affect the mechanical property of plasticizing rubber powder and reclaimed rubber, reduce the attached of product
Value added and economic benefit, while being also a kind of waste to rubber sources.To sum up think that the plasticizing of rubber powder should utilize S-S
Key or C-S bond energys are less than the mechanism of C-C keys, i.e., realize that rubber powder is de- by heat chemistry effect selectively to disconnect cross-bond
Sulphur is plasticized, and avoids the fracture of a large amount of main chain C-C keys, influences the mechanical property for being plasticized rubber powder.Thermochemical key be efficiently and
Uniformly to the heat transfer of rubber powder, rubber powder is the non-conductor of heat, very low without the heat-conduction effect of squeezing action rubber powder granule, well
Heat transfer type be ensure the uniform desulfurization of rubber powder, obtain it is high performance plasticizing rubber powder premise.
Invention content：
It is an object of the invention to overcome, there are a large amount of hard in existing spiral or the uneven initiation sizing material of screw rod heat transfer
Grain and high shear twin-screw the shortcomings that seriously being destroyed to rubber powder main chain C-C keys, provide that a kind of environmental protection, safely low sheraing is double in the same direction
The method that screw rod continuously prepares high-performance plasticizing rubber powder.
The purpose of the present invention is what is realized by following below scheme：A kind of double rank low sheraing parallel dual-screws continuously prepare high property
The method that rubber powder can be plasticized, it is characterized in that rubber powder, softening agent and activator are delivered to the first rank parallel dual-screw after evenly mixing
In extruder, heater and conduction oil realize the heating to extruder barrel and screw rod respectively, and S-S is disconnected under heat chemistry effect
Cross-bond obtains 200~280 DEG C of plasticizing rubber powders and vertically falls into the second-order parallel dual-screw of docking, passes through barrel and screw rod
Plasticizing rubber powder is cooled to 30~70 DEG C by the heat exchange effect for the cooling water that 0~30 DEG C of mandrel.
The part intermeshing co-rotating twin-screw continuously prepares the device of high-performance plasticizing rubber powder, it is characterised in that：Screw rod
Diameter D is 50~300 millimeters, and draw ratio L/D is 10：1~30：1, screw channel depth H is 4~40 millimeters, and centre-to-centre spacing CL is
35~300 millimeters；The machine barrel and screw rod of the twin-screw are monoblock type or building block system, and screwing element is delivery element, cuts
Cut two or three in element and toothed element.
The method that double rank low sheraing parallel dual-screws continuously prepare high-performance plasticizing rubber powder, it is characterised in that first
Heater is equipped on the outside of the machine barrel of rank parallel dual-screw, entire cylinder is divided into exhaust transportation section and fluxing zone, is vented transportation section
Heating temperature is 100~210 DEG C, and the heating temperature of fluxing zone is 210~300 DEG C, and screw mandrel is provided with the inlet and outlet of conduction oil,
Heat conduction oil temperature is 150~300 DEG C；Screw speed is 30~85rpm, and the rubber powder plasticizing time is 4~9min.
The method that double rank low sheraing parallel dual-screws continuously prepare high-performance plasticizing rubber powder, it is characterised in that second
The barrel chuck of rank parallel dual-screw extruding machine is equipped with cooling water recirculation system, and screw mandrel is provided with cooling water outlet and inlet, machine barrel
Thermocouple is connected on outer wall, circulating cooling water temperature is 0~30 DEG C.
The method that double rank low sheraing parallel dual-screws continuously prepare high-performance plasticizing rubber powder, it is characterised in that：Glue
Powder is waste-tyre rubber-powder, and grain size is 20~60 mesh, and softening agent is in aromatic naphtha, pine tar, tall oil, naphthenic oil, rosin
One or more of mixtures, activator are that bis- (6- tertiary butyls are to benzene for diphenyl disulfide, diallyl disulfide, 2-2 '-curing
Phenol), the mixture of one kind of amine compound or a few persons；Rubber powder：Softening agent：The quality parts ratio of activator is 100：(10~
25)：(0.1~2).
The method that double rank low sheraing parallel dual-screws continuously prepare high-performance plasticizing rubber powder, it is characterised in that glue
The hybrid technique of powder, softening agent and activator is that softening agent stirring is preheated at 60~130 DEG C, and proportioned activator input is soft
It is stirred 5~10min in agent, three's mixture input has in the homogenizer of rubber powder by quality parts ratio, discharge
Temperature setting is at 90~130 DEG C, later continuously in the first rank low sheraing parallel dual-screw of input.
Device of the present invention using the parallel dual-screw extruding machine partly engaged as plasticizing and the cooling of rubber powder, ensure that
Entire production process is closed, safe, continuous and environmentally friendly.The low sheraing of the parallel dual-screw of part engagement avoids rubber powder main chain
It destroys, while preventing the rubber powder of viscosity viscous to screw rod glutinous and carbonization.The heater and mandrel conduction oil of plasticizing extruder barrel
Temperature control rubber powder is heated evenly, such as depend merely on the heater heat transfer of barrel, heat inevitably results in when conducting heat from barrel to screw rod
The presence of temperature stratification, and rubber powder has long-time and large area during double screw extruder is fed forward with screw rod
Contact, such as cannot solve this heat transfer problem necessarily and cause the plasticizing inhomogeneities of rubber powder and in plasticizing rubber powder and reclaimed rubber
A large amount of hard particles are generated, the quality and appearance of product are influenced.It is deep that the parallel dual-screw design of part engagement provides small screw channel
Degree and certain mixed effect, are more the increase in the uniformity of thin bed of material plasticizing, and are arranged by the Combination Design of screwing element
Gas transportation section, it can prevent air from entering the plastic phase of rubber powder, prevent destruction of the oxygen at high temperature to rubber powder performance.It is cooling
Parallel dual-screw extruding machine also utilizes this efficient heat transfer theory to the high temperature rubber powder fast cooling of plasticizing, passes through heat
The inflow of cooling water is adjusted in the practical thermometric of galvanic couple, obtains the technological temperature for meeting follow-up refining operation requirement.
Specific implementation mode
The present invention will be further described With reference to embodiment.
Embodiment 1：Using useless 100 parts of the heavy load radial carcass rubber powder of 20 purposes, 14 parts of aromatic naphtha, 5 parts of tall oil are soft
Agent, 0.2 part of 2,2 '-curing bis- (6- tertiary butyls Pyrogentisinic Acids) are activator, and hybrid technique is as follows：Aromatic naphtha and tall oil
It is stirred preheating in 100 DEG C of oil tank, is stirred in 2,2 '-curing bis- (6- tertiary butyls Pyrogentisinic Acids) input oil tank
Three's mixture input is mixed in the closed blender of rubber powder by 7min by quality parts ratio, and dump temperature is arranged at 110 DEG C,
It is sent to parallel dual-screw extruding machine (D=50mm, L/D=10, H=8mm, the C of part engagementL=38mm, 8 heating zones
Section, wherein the first and secondth area is exhaust transportation section, third to 8th area is fluxing zone), the temperature of each heated zones is respectively set as
140 DEG C, 180 DEG C, 220 DEG C, 240 DEG C, 240 DEG C, 220 DEG C, 180 DEG C, 140 DEG C, the first rank plasticized screw rotating speed is 60r/min,
Fusion time is 8min, by entering cooling part meshing co rotating twin screw extrusion (D=50mm, L/D=after head extrusion
10, H=8mm, CL=38mm), second-order cooling screw rotating speed is 50r/min, the coolant water temperature of barrel chuck and screw mandrel
Degree is 12 DEG C, inflow 400kg/hr, the plasticizing rubber powder that temperature is 40 DEG C is prepared, through 4 bench rollers away from the conche for 0.2mm
(in following embodiment except have specified otherwise to be all made of this refinery practice) tabletting is up to required reclaimed rubber after thin logical 13 times.Gained is again
Properties are as follows：Ash content=7.0%, acetone extract=18.5%, Mooney viscosity ML100℃(1+4)=80；According to GB/T
Sulfurizing formula vulcanizes 13460-2016 reclaimed rubbers again, and the mechanical property of vulcanized rubber of preparation is as follows：Tensile strength=11.8Mpa, is pulled
Disconnected elongation=401%.
National R-TW standards：Ash content≤12%, acetone extract≤26%, ML100 DEG C of Mooney viscosity (1+4min)≤
85, tensile strength >=8.0Mpa, elongation at break >=330%.
Embodiment 2：Using useless 100 parts of the truck radial tire tread rubber powder of 30 purposes, 16 parts of aromatic naphtha, 4 parts of pine tar
For softening agent, 0.4 part of diallyl disulfide is activator, and hybrid technique is as follows：The oil of aromatic naphtha and pine tar at 120 DEG C
It is stirred preheating in tank, is stirred 7min in diallyl disulfide input oil tank, mixes three by quality parts ratio
It closes object input to be mixed in the closed blender of rubber powder, the double spiral shells in the same direction for being added into part engagement at 105 DEG C are arranged in dump temperature
Bar extruder (D=50mm, L/D=10, H=8mm, CL=38mm, 8 heated zones convey wherein the first and secondth area is exhaust
Section, third to 8th area are fluxing zone), the temperature of each heated zones be respectively set as 140 DEG C, 180 DEG C, 220 DEG C, 235 DEG C, 235
DEG C, 220 DEG C, 180 DEG C, 140 DEG C), the first rank plasticized screw rotating speed be 66r/min, fusion time 6min, by head extrusion
Enter cooling part meshing co rotating twin screw extrusion (D=50mm, L/D=10, H=8mm, C afterwardsL=38mm), second-order
Cooling screw rotating speed is 57r/min, and the cooling water temperature of barrel chuck and screw mandrel is 10 DEG C, inflow 350kg/hr, system
The standby plasticizing rubber powder for obtaining temperature and being 43 DEG C, through 4 bench rollers away from the conche for 0.2mm it is thin it is 13 times logical after tabletting up to it is required again
Raw rubber.Gained reclaimed rubber performance is as follows：Ash content=7.9%, acetone extract=17.8%, Mooney viscosity ML100℃(1+4)=
75；According to GB/T 13460-2016 reclaimed rubbers, sulfurizing formula vulcanizes again, and the mechanical property of vulcanized rubber of preparation is as follows：Tensile strength
=14.6Mpa, elongation at break=480%.
National R-TT standards：Ash content≤10%, acetone extract≤19%, ML100 DEG C of Mooney viscosity (1+4min)≤
95, tensile strength >=12.0Mpa, elongation at break >=400%.
Embodiment 3：Using useless 100 parts of the truck radial tire tread rubber powder of 60 purposes, 16 parts of aromatic naphtha, 2 parts of rosin are
Softening agent, 0.5 part of diallyl disulfide is activator, and hybrid technique is as follows：Aromatic naphtha and rosin are in 130 DEG C of oil tank
It is stirred preheating, 10min is stirred in diallyl disulfide input oil tank, by quality parts ratio by three's mixture
Input is mixed in the closed blender of rubber powder, and at 110 DEG C, the parallel dual-screw for being added into part engagement squeezes for dump temperature setting
Go out machine (D=300mm, L/D=20, H=30mm, CL=255mm, 8 heated zones convey wherein the first and secondth area is exhaust
Section, third to 8th area are fluxing zone), the temperature of each heated zones be respectively set as 150 DEG C, 190 DEG C, 230 DEG C, 250 DEG C, 250
DEG C, 230 DEG C, 180 DEG C, 140 DEG C, the first rank plasticized screw rotating speed be 56r/min, fusion time 8min, after head extrusion
Into cooling part meshing co rotating twin screw extrusion (D=300mm, L/D=20, H=30mm, CL=255mm), second-order
Cooling screw rotating speed is 50r/min, and the cooling water temperature of barrel chuck and screw mandrel is 7 DEG C, inflow 410kg/hr, system
The standby plasticizing rubber powder for obtaining temperature and being 35 DEG C, through 4 bench rollers away from the conche for 0.2mm it is thin it is 13 times logical after tabletting up to it is required again
Raw rubber.Gained reclaimed rubber performance is as follows：Ash content=7.8%, acetone extract=16.9%, Mooney viscosity ML100℃(1+4)=
81；According to GB/T 13460-2016 reclaimed rubbers, sulfurizing formula vulcanizes again, and the mechanical property of vulcanized rubber of preparation is as follows：Tensile strength
=13.6Mpa, elongation at break=462%.
National R-TT standards：Ash content≤10%, acetone extract≤19%, ML100 DEG C of Mooney viscosity (1+4min)≤
95, tensile strength >=12.0Mpa, elongation at break >=400%.
Claims (6)
1. a kind of method that double rank low sheraing parallel dual-screws continuously prepare plasticizing rubber powder, it is characterized in that rubber powder, softening agent and work
Agent is delivered to after evenly mixing in the first rank parallel dual-screw extruding machine, and heater and conduction oil are realized respectively to extruder barrel
The heating of wall and screw rod disconnects S-S cross-bonds under heat chemistry effect, obtains 200~280 DEG C of plasticizing rubber powders and vertically falls into docking
Second-order parallel dual-screw extruding machine in, will plasticizing by the heat exchange of barrel and the cooling water of 0~30 DEG C of screw mandrel effect
Rubber powder is cooled to 30~70 DEG C；Screw diameter D in first rank parallel dual-screw extruding machine and second-order parallel dual-screw extruding machine
It it is 50~300 millimeters, draw ratio L/D is 10：1~30：1, screw channel depth H is 4~40 millimeters, centre-to-centre spacing CLFor 35~
300 millimeters.
2. the method that double rank low sheraing parallel dual-screws according to claim 1 continuously prepare plasticizing rubber powder, feature exist
In：The machine barrel and screw rod of the twin-screw are monoblock type or building block system, and screwing element is delivery element, shearing elements and tooth
Two or three in shape element.
3. the method that double rank low sheraing parallel dual-screws according to claim 1 continuously prepare plasticizing rubber powder, feature exist
Heater is equipped on the outside of the machine barrel of the first rank parallel dual-screw, entire cylinder is divided into exhaust transportation section and fluxing zone, and exhaust is defeated
It is 100~210 DEG C to send the heating temperature of section, and the heating temperature of fluxing zone is 210~300 DEG C, and screw mandrel is provided with conduction oil
Inlet and outlet, heat conduction oil temperature are 150~300 DEG C；Screw speed is 30~85rpm, and the rubber powder plasticizing time is 4~9min.
4. the method that double rank low sheraing parallel dual-screws according to claim 1 continuously prepare plasticizing rubber powder, feature exist
It is equipped with cooling water recirculation system in the barrel chuck of second-order parallel dual-screw extruding machine, screw mandrel is provided with cooling water disengaging
Mouthful, it is connected with thermocouple on machine barrel outer wall.
5. the method that double rank low sheraing parallel dual-screws according to claim 1 continuously prepare plasticizing rubber powder, feature exist
In：Rubber powder is waste-tyre rubber-powder, and grain size is 20~60 mesh, and softening agent is aromatic naphtha, pine tar, tall oil, naphthenic oil, rosin
One or more of mixture, activator be diphenyl disulfide, diallyl disulfide, bis- (the 6- tertiary butyls of 2-2 '-curing
Pyrogentisinic Acid), the mixture of one kind of amine compound or a few persons；Rubber powder：Softening agent：The quality parts ratio of activator is 100：
(10~25)：(0.1~2).
6. the method that double rank low sheraing parallel dual-screws according to claim 1 continuously prepare plasticizing rubber powder, feature exist
It is that softening agent stirring is preheated at 60~130 DEG C in the hybrid technique of rubber powder, softening agent and activator, proportioned activator input
It is stirred 5~10min in softening agent, the two mixture input is mixed in the blender of rubber powder by quality parts ratio, discharge
Temperature setting is at 90~130 DEG C, later continuously in the first rank low sheraing parallel dual-screw of input.
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| CN112409542A (en) * | 2020-12-10 | 2021-02-26 | 潍坊硕邑化学有限公司 | Continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102977404A (en) * | 2012-10-29 | 2013-03-20 | 北京化工大学 | Method for continuous preparation of reclaimed rubber by using dual-band twin-screw extruder |
| CN104690843A (en) * | 2015-03-08 | 2015-06-10 | 南京绿金人橡塑高科有限公司 | Anti-adhesion double-stage double-rotor device for continuously cooling desulfurized rubber powder and method |
| CN105729755A (en) * | 2016-03-07 | 2016-07-06 | 南京科晋橡塑科技有限公司 | Rubber plastifying extrusion production process for multiple stages of screws |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102977404A (en) * | 2012-10-29 | 2013-03-20 | 北京化工大学 | Method for continuous preparation of reclaimed rubber by using dual-band twin-screw extruder |
| CN104690843A (en) * | 2015-03-08 | 2015-06-10 | 南京绿金人橡塑高科有限公司 | Anti-adhesion double-stage double-rotor device for continuously cooling desulfurized rubber powder and method |
| CN105729755A (en) * | 2016-03-07 | 2016-07-06 | 南京科晋橡塑科技有限公司 | Rubber plastifying extrusion production process for multiple stages of screws |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112409542A (en) * | 2020-12-10 | 2021-02-26 | 潍坊硕邑化学有限公司 | Continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber |
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Denomination of invention: A method for continuous preparation of high performance plasticized rubber powder by double-step low-shear co-rotating twin screw Effective date of registration: 20230222 Granted publication date: 20210629 Pledgee: Nanjing Branch of Jiangsu Bank Co.,Ltd. Pledgor: NANJING L.J.R. RUBBE & PLASTIC Co.,Ltd. Registration number: Y2023980033248 |
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