CN111218029A - Production process of reclaimed rubber with excellent comprehensive performance - Google Patents

Production process of reclaimed rubber with excellent comprehensive performance Download PDF

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Publication number
CN111218029A
CN111218029A CN201911057747.XA CN201911057747A CN111218029A CN 111218029 A CN111218029 A CN 111218029A CN 201911057747 A CN201911057747 A CN 201911057747A CN 111218029 A CN111218029 A CN 111218029A
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CN
China
Prior art keywords
rubber
tire
rubber powder
desulfurization tank
comprehensive performance
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911057747.XA
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Chinese (zh)
Inventor
陈本德
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Dechang Jinfeng Rubber Co ltd
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Dechang Jinfeng Rubber Co ltd
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Priority to CN201911057747.XA priority Critical patent/CN111218029A/en
Publication of CN111218029A publication Critical patent/CN111218029A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00Recovery or working-up of waste materials
    • C08J11/04Recovery or working-up of waste materials of polymers
    • C08J11/10Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2317/00Characterised by the use of reclaimed rubber
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention discloses a production process of reclaimed rubber with good comprehensive performance, which relates to the technical field of rubber preparation and comprises the following steps of 1) tire crushing; 2) screening rubber powder; 3) desulfurizing rubber powder; 4) kneading; 5) filtering; 6) refining; 7) tabletting and forming; 8) warehousing a finished product; the tire crushing in the step 1 comprises the steps of cutting separation, slitting, dicing and crushing treatment, and rubber powder particles can be obtained through the step 1; the step 3 of desulfurizing the rubber powder comprises the following specific steps: preheating a rubber regeneration dynamic desulfurization tank to 150-170 ℃, guiding screened rubber powder into the rubber regeneration dynamic desulfurization tank, simultaneously adding a chemical auxiliary agent, wherein the mass ratio of the rubber powder to the chemical auxiliary agent is 1000: 100-150, the chemical auxiliary agent comprises a softening agent and an activating agent, the dosage ratio of the softening agent to the activating agent is 10:1, desulfurizing for 60-70 minutes in an environment with the temperature of 210 ℃ and the pressure of 2.1MPa, and simultaneously, feeding into the rubber regeneration dynamic desulfurization tank to continuously turn over materials in the rubber regeneration dynamic desulfurization tank.

Description

Production process of reclaimed rubber with excellent comprehensive performance
Technical Field
The invention relates to the technical field of rubber preparation, in particular to a production process of reclaimed rubber with excellent comprehensive performance.
Background
China is a large rubber consumption country, but resources are deficient, and 80% of natural rubber depends on import. The tread reclaimed rubber is prepared by taking a layer of rubber material with patterns printed on the surface, which is in contact with the road surface, of the outermost layer of the tire as a raw material, extruding the rubber material by a screw extruder or calendering the rubber material by a calender and cooling the rubber material, and is also commonly called as tread rubber. Has high wear resistance, high fatigue resistance, high ageing resistance, high tensile strength, high elasticity and high toughness. The rubber which is processed by taking waste tires as raw materials, has certain plasticity and can be reused. The reclaimed rubber of the tire is divided into an outer tire type, an inner tire type, rubber shoes and the like according to different used waste rubber. The reclaimed rubber can partially replace the raw rubber to be used for rubber products, so that the raw rubber and the carbon black are saved, and the processability and certain properties of the rubber products are improved. At present, domestic environment-friendly reclaimed rubber, hyperfine reclaimed rubber and high-strength tire reclaimed rubber are in short supply and demand. In the traditional chemical regeneration method, the regeneration of the waste rubber is realized by means of media such as water vapor, oil and the like in the process that the regenerant reacts and permeates into the rubber powder. The chemical regeneration mechanism has good regeneration effect and low cost, so the chemical regeneration mechanism is widely adopted in the industry and gradually develops an oil method, a water-oil method, a dynamic desulfurization method and the like. The production process of regenerated rubber with waste rubber tyre, rubber shoe and other waste rubber products as material includes the following steps: rubber powder preparation (the waste tires are subjected to cleaning, chopping, magnetic separation, screening and fiber separation to remove iron and fiber materials in the tires), desulfurization, kneading, filtration, refining and forming to obtain a finished product of reclaimed rubber. The reclaimed rubber obtained at present has a plurality of advantages and is used in a large amount, but the energy consumption in the production process is too high, and the produced tire has poor flex crack resistance, poor tearing resistance, poor aging resistance and low physical and mechanical strength.
Disclosure of Invention
The invention aims to: the invention aims to overcome the defects of the background technology, and provides a production process of reclaimed rubber with good comprehensive performance, which reduces the production energy consumption of rubber products and improves the flex crack resistance, the tearing resistance, the aging resistance and the physical and mechanical strength.
The invention specifically adopts the following technical scheme for realizing the purpose:
a production process of reclaimed rubber with good comprehensive performance comprises the following steps of 1) tire crushing; 2) screening rubber powder; 3) desulfurizing rubber powder; 4) kneading; 5) filtering; 6) refining; 7) tabletting and forming; 8) warehousing a finished product; the tire crushing in the step 1 comprises the steps of cutting separation, slitting, dicing and crushing treatment, and rubber powder particles can be obtained through the step 1; enabling the rubber powder particles obtained in the step 2 to pass through multistage vibrating sieves, and arranging strong magnets at inlets and outlets of all the vibrating sieves; the step 3 of desulfurizing the rubber powder comprises the following specific steps: preheating a rubber regeneration dynamic desulfurization tank to 150-170 ℃, introducing screened rubber powder into the rubber regeneration dynamic desulfurization tank, simultaneously adding a chemical auxiliary agent, wherein the mass ratio of the rubber powder to the chemical auxiliary agent is 1000: 100-150, the chemical auxiliary agent consists of a softening agent and an activating agent, the dosage ratio of the softening agent to the activating agent is 10:1, desulfurizing for 60-70 minutes in an environment with the temperature of 210 ℃ and the pressure of 2.1MPa, simultaneously putting the rubber regeneration dynamic desulfurization tank into the rubber regeneration dynamic desulfurization tank to continuously turn over materials in the rubber regeneration dynamic desulfurization tank, and the softening agent comprises vegetable oil, rosin, 820 resin auxiliary agents, aromatic oil, stearic acid and zinc oxide.
On the basis of the technical scheme, the separation is cut off in the step 1: putting the waste tire on a steel ring cutting machine, cutting the waste tire, and separating steel wires in the waste tire from the tire by adopting a tire bead separator; slitting and dicing in the step 1: conveying the separated tire to a tire strip cutting machine through a conveying chain for strip cutting, and slowly passing the obtained strip rubber block through a tire strip cutting machine through a conveyor to obtain a strip rubber block; the crushing treatment in the step 1: and crushing the obtained block rubber block by a rubber crusher to obtain rubber powder.
On the basis of the technical scheme, the specific method of the step 6 comprises the following steps: uniformly mixing the desulfurized rubber powder with a stabilizer, refining by using refining equipment at the temperature of 110 ℃, wherein the stabilizer consists of cyclohexylbenzene and phenylenediamine, the mass ratio of the rubber powder to the stabilizer is 100: 2-3, and cooling after refining is finished to finally obtain the stable reclaimed rubber.
On the basis of the technical scheme, the refining equipment comprises a refiner, a co-rotating double screw, a co-rotating triple screw and a co-rotating multi-screw.
On the basis of the technical scheme, the vegetable oil is linseed oil or castor oil; the aromatic oil is xylene or ethylbenzene.
The invention has the beneficial effects that: the tear strength and the yield resistance of the rubber product are improved by multiple crushing and screening, and the plant-based environment-friendly oil is used as a regeneration softener, so that the rubber product is low-carbon, environment-friendly and pollution-free, and the raw materials required by the production of the plant-based environment-friendly oil are wide in source, simple and easy to obtain, so that the production cost is reduced; strong magnets are arranged at the inlet and the outlet of the vibrating screen and separate steel wires doped in the colloidal particles, so that the production effect is improved; the stabilizer consisting of the cyclohexylbenzene and the phenylenediamine is used for controlling the type of active groups generated in the refining process, so that the Mooney viscosity rebound is effectively reduced, the desulfurized rubber powder is easier to refine, the energy consumption is greatly reduced, and the production cost of reclaimed rubber is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a production process of reclaimed rubber with good comprehensive performance, which comprises the following steps of 1) tire crushing; 2) screening rubber powder; 3) Desulfurizing rubber powder; 4) kneading; 5) filtering; 6) refining; 7) tabletting and forming; 8) warehousing a finished product; the tire crushing in the step 1 comprises the steps of cutting separation, slitting, dicing and crushing treatment, and rubber powder particles can be obtained through the step 1; enabling the rubber powder particles obtained in the step 2 to pass through multistage vibrating sieves, and arranging strong magnets at inlets and outlets of all the vibrating sieves; the step 3 of desulfurizing the rubber powder comprises the following specific steps: preheating a rubber regeneration dynamic desulfurization tank to 150-170 ℃, introducing screened rubber powder into the rubber regeneration dynamic desulfurization tank, simultaneously adding a chemical auxiliary agent, wherein the mass ratio of the rubber powder to the chemical auxiliary agent is 1000: 100-150, the chemical auxiliary agent consists of a softening agent and an activating agent, the dosage ratio of the softening agent to the activating agent is 10:1, desulfurizing for 60-70 minutes in an environment with the temperature of 210 ℃ and the pressure of 2.1MPa, simultaneously putting the rubber regeneration dynamic desulfurization tank into the rubber regeneration dynamic desulfurization tank to continuously turn over materials in the rubber regeneration dynamic desulfurization tank, and the softening agent comprises vegetable oil, rosin, 820 resin auxiliary agents, aromatic oil, stearic acid and zinc oxide.
In the embodiment, multiple crushing and screening are utilized, the tear strength and the yield resistance of the rubber product are improved, meanwhile, the plant-based environment-friendly oil is used as a regeneration softener, the low-carbon environment-friendly environment; strong magnets are arranged at the inlet and the outlet of the vibrating screen and separate steel wires doped in the colloidal particles, so that the production effect is improved; the stabilizer consisting of the cyclohexylbenzene and the phenylenediamine is used for controlling the type of active groups generated in the refining process, so that the Mooney viscosity rebound is effectively reduced, the desulfurized rubber powder is easier to refine, the energy consumption is greatly reduced, and the production cost of reclaimed rubber is reduced.
Example 2
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
cutting and separating in the step 1: putting the waste tire on a steel ring cutting machine, cutting the waste tire, and separating steel wires in the waste tire from the tire by adopting a tire bead separator; slitting and dicing in the step 1: conveying the separated tire to a tire strip cutting machine through a conveying chain for strip cutting, and slowly passing the obtained strip rubber block through a tire strip cutting machine through a conveyor to obtain a strip rubber block; the crushing treatment in the step 1: and crushing the obtained block rubber block by a rubber crusher to obtain rubber powder.
Example 3
The embodiment is further optimized on the basis of the embodiment 2, and specifically comprises the following steps:
the specific method of the step 6 comprises the following steps: uniformly mixing the desulfurized rubber powder with a stabilizer, refining by using refining equipment at the temperature of 110 ℃, wherein the stabilizer consists of cyclohexylbenzene and phenylenediamine, the mass ratio of the rubber powder to the stabilizer is 100: 2-3, and cooling after refining is finished to finally obtain the stable reclaimed rubber.
Example 4
The embodiment is further optimized on the basis of embodiment 3, and specifically includes:
the refining equipment comprises a refiner, a co-rotating double screw, a co-rotating triple screw and a co-rotating multi-screw.
Example 5
The embodiment is further optimized on the basis of embodiment 3, and specifically includes:
the vegetable oil is linseed oil or castor oil; the aromatic oil is xylene or ethylbenzene.
The above description is an embodiment of the present invention. The foregoing is a preferred embodiment of the present invention, and the preferred embodiments in each preferred embodiment can be combined and used in any combination if not obviously contradictory or prerequisite to a certain preferred embodiment, and the specific parameters in the examples and the embodiments are only for the purpose of clearly explaining the inventor's invention verification process and are not intended to limit the patent protection scope of the present invention, which is defined by the claims and the equivalent structural changes made by the content of the description of the present invention are also included in the protection scope of the present invention.

Claims (5)

1. A production process of reclaimed rubber with good comprehensive performance comprises the following steps of 1) tire crushing; 2) screening rubber powder; 3) desulfurizing rubber powder; 4) kneading; 5) filtering; 6) refining; 7) tabletting and forming; 8) warehousing a finished product; the method is characterized in that tire crushing in the step 1 comprises truncation separation, slitting, dicing and crushing treatment, and rubber powder particles can be obtained through the step 1; enabling the rubber powder particles obtained in the step 2 to pass through multistage vibrating sieves, and arranging strong magnets at inlets and outlets of all the vibrating sieves; the step 3 of desulfurizing the rubber powder comprises the following specific steps: preheating a rubber regeneration dynamic desulfurization tank to 150-170 ℃, introducing screened rubber powder into the rubber regeneration dynamic desulfurization tank, simultaneously adding a chemical auxiliary agent, wherein the mass ratio of the rubber powder to the chemical auxiliary agent is 1000: 100-150, the chemical auxiliary agent comprises a softening agent and an activating agent, the dosage ratio of the softening agent to the activating agent is 10:1, desulfurizing for 60-70 minutes in an environment with the temperature of 210 ℃ and the pressure of 2.1MPa, simultaneously putting the rubber regeneration dynamic desulfurization tank into the rubber regeneration dynamic desulfurization tank to continuously turn over materials in the rubber regeneration dynamic desulfurization tank, and the softening agent comprises vegetable oil, rosin, 820 resin auxiliary agents, aromatic oil, stearic acid and zinc oxide.
2. The process for producing reclaimed rubber with excellent comprehensive performance according to claim 1, wherein the step 1 is characterized in that the separation is cut off: putting the waste tire on a steel ring cutting machine, cutting the waste tire, and separating steel wires in the waste tire from the tire by adopting a tire bead separator; slitting and dicing in the step 1: conveying the separated tire to a tire strip cutting machine through a conveying chain for strip cutting, and slowly passing the obtained strip rubber block through a tire strip cutting machine through a conveyor to obtain a strip rubber block; the crushing treatment in the step 1: and crushing the obtained block rubber block by a rubber crusher to obtain rubber powder.
3. The process for producing reclaimed rubber with excellent comprehensive performance according to claim 1, wherein the specific method in the step 6 comprises the following steps: uniformly mixing the desulfurized rubber powder with a stabilizer, refining by using refining equipment at the temperature of 110 ℃, wherein the stabilizer consists of cyclohexylbenzene and phenylenediamine, the mass ratio of the rubber powder to the stabilizer is 100: 2-3, and cooling after refining is finished to finally obtain the stable reclaimed rubber.
4. The process for producing reclaimed rubber with excellent comprehensive performance as claimed in claim 3, wherein the refining equipment comprises a refiner, a co-rotating twin screw, a co-rotating triple screw and a co-rotating multi-screw.
5. The process for producing reclaimed rubber with excellent comprehensive performance according to any one of claims 1 to 4, wherein the vegetable oil is linseed oil or castor oil; the aromatic oil is xylene or ethylbenzene.
CN201911057747.XA 2019-10-31 2019-10-31 Production process of reclaimed rubber with excellent comprehensive performance Pending CN111218029A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115107197A (en) * 2022-07-28 2022-09-27 黑龙江工程学院 Resource regeneration treatment method for waste tires

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105461956A (en) * 2015-12-30 2016-04-06 仙桃市聚兴橡胶有限公司 Production technique of green environment-friendly tire reclaimed rubber
CN108058298A (en) * 2018-01-24 2018-05-22 临沭县中泰橡胶制品有限公司 A kind of preparation method of ultra-fine ground rubber
CN108912431A (en) * 2018-06-08 2018-11-30 四川省隆昌海燕橡胶有限公司 A kind of flexible damping technique for regenerated rubber
CN109776898A (en) * 2018-12-28 2019-05-21 南京绿金人橡塑高科有限公司 A kind of Mooney viscosity stablizes reclaimed rubber and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105461956A (en) * 2015-12-30 2016-04-06 仙桃市聚兴橡胶有限公司 Production technique of green environment-friendly tire reclaimed rubber
CN108058298A (en) * 2018-01-24 2018-05-22 临沭县中泰橡胶制品有限公司 A kind of preparation method of ultra-fine ground rubber
CN108912431A (en) * 2018-06-08 2018-11-30 四川省隆昌海燕橡胶有限公司 A kind of flexible damping technique for regenerated rubber
CN109776898A (en) * 2018-12-28 2019-05-21 南京绿金人橡塑高科有限公司 A kind of Mooney viscosity stablizes reclaimed rubber and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115107197A (en) * 2022-07-28 2022-09-27 黑龙江工程学院 Resource regeneration treatment method for waste tires

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Application publication date: 20200602