Engineers and scientists all over the world are challenged by the waste problem on horizon. An engineer who claims to have a solution is Michael Vainer, inventor and founder of Polymeric Powders Company. According to the magazine, he has been trying to develop solutions for tire waste for more than a decade and a half. New rubber devulcanization technology Michael Vainer is an …
In this study the devulcanization process of the tread section of waste tires was carried out by using a twin‐screw extruder. The effects of barrel temperature and screw speed were investigated. Percent of devulcanization, sol fraction, and curing behavior of devulcanized samples were studied.
Through the devulcanization of end-of-life tires (ELT), it is possible to produce new raw materials with good mechanical properties and a superior environmental footprint over products. The devulcanization process has become an interesting technology that is able to support the circular
The article addresses established devulcanization technologies and novel processes described in the scientific and patent literatures, and presents an update on the state-of-the art in rubber devULcanization. In general, composite materials are difficult to recycle. Tires belong to this class of materials. On top, one of their main constitutents, vulcanized rubber, is as elastomer, which ...
The resource reclamation of waste tire rubber (WTR) is regarded as the most suitable strategy for these solid wastes. Water jet pulverization (WJPul) is a sustainable reclamation technique for WTR, since both size reduction and rubber devulcanization can be achieved.
mesh scrap tire rubber). It is made by mixing ground tire rubber with asphalt binder. Hot air at 69 kPa (10 psi), 177-252 oC (350-485 F) and 62 M 3/min (2200 ft/min) is blown through the mixture until the rubber is dissolved. The air blowing process is described in the patent as "abrasive absorption," no high shear milling is involved
of tires is the burning of money…" Devulcanization ˜ere is, therefore, a powerful case for devulcanization. Indeed, the process is by no means a concept of 21st-century need to reduce waste and conserve resources. Charles Goodyear, a˝er whom the tire company is named, started to consider ways of devulcanization soon a˝er receiving
Waste tire rubber (WTR) supplied by a truck tire retreader were processed in an intermeshing co-rotating twin-screw extruder (ICTSE). The extrusion process evaluated the efficiency of the thermomechanical recycling in the devulcanization of WTR rubbers.
The ultrasonic devulcanization of ground tire rubber (GTR) of 40 meshes using an ultrasonic twin-screw extruder was studied. The die pressure and ultrasonic power consumption were recorded during the process of devulcanization. Devulcanization was carried out at a frequency of 40 kHz and ultrasonic amplitudes at 0 [micrometers] and 8 [micrometers].
Through the devulcanization of end-of-life tires (ELT), it is possible to produce new raw materials with good mechanical properties and a superior environmental footprint over products. The devulcanization process has become an interesting technology that is able to support the circular economy concept.
The high participation shows that the tire recycling industry is interested in innovative technology solutions for end-of-life tire devulcanization. The positive feedback from the session attests to the fact that established recyclers are looking for better ways to recycle tires, reach broader markets and achieve higher performance in the ...
Devulcanization is a method of potentially "upgrading" end-of-life tire rubber. Devulcanized rubber is a higher valued form of end-of-life rubber, since devulcanized material can be partly revulcanized and partially replace rubber in specific compounds and applications, including tires. Currently, only a small number of devulcanization systems are operating on industrial scale.
A process for devulcanizing a rubber vulcanizate by desulfurization involves suspending a rubber vulcanizate crumb in a solvent which preferably swells the rubber vulcanizate before or during the devulcanization reaction and adding an alkali metal, such as sodium, to the suspension. The alkali metal cleaves mono-, di- and polysulfidic cross-linkages in the rubber vulcanizate to liberate rubber ...
The devulcanization of tire rubber obviously decreases the viscosity of rubberized asphalt and makes it more homogeneous . The devulcanization or degradation of tire rubber in asphalt is a useful method that can be used to help promote rubberized asphalt in terms of ease of processability, without concern for the special design of the mixture.
Chemical Devulcanization of Whole Truck Tire Rubber. Recycling of rubber is the need of the hour considering the rapid depletion of resources. Used tires are one waste stream worth to consider for recycling. Possibilities for re-use of tire materials are granulate, reclaim or devulcanizate. Devulcanization is a chemical process; however, the ...
Ghavipanjeh F., Ziaei Rad Z. & Pazouki M. Devulcanization of ground tires by different strains of bacteria: Optimization of culture condition by Taguchi method. J. …
The article addresses established devulcanization technologies and novel processes described in the scientific and patent literatures. On the one hand, tires have become high-tech products, where the simultaneous improvement of wet traction, rolling resistance, and abrasion resistance (the so-called "magic triangle") is hard to achieve.
devulcanization of ground tire rubber (GTR), the impact of bitumen content (in the range of: 0–2.5 phr) on structure-properties of resulting materials was determined. 2. Materials and Methods 2.1. Materials GTR with particles size below 0.5 mm was received from Grupa Recykl S.A. (Srem, Poland).´ ...
impact for those in the tire industry and society as a whole. We need to work together! Tyromer devulcanizes scrap tire rubber for reuse in new tires. Our carbon dioxide assisted extrusion technology works without devulcanization chemicals or chemical solvents to continuously convert scrap tire crumb into an elastomeric TDP, or Tire-Derived ...
This article aims at analyzing the rubber devulcanization process and highlighting the limits that prevent reintegration of devulcanized rubber in the part same application / original compound. Afterwards a solution will be proposed to overcome these limits and some industrial applications will be shown with values of improvement.
added during the tire manufacturing process, such as vulcanization additives, softeners and fillers. Interest-ingly, carbon black is the most widely used filler [18]. 2.2. Recycling of ground tire rubber: Devulcanization process Vulcanized ground tire rubber (GTRv) samples were recycled by devulcanization using microwaves. This
Through the devulcanization of end-of-life tires (ELT), it is possible to produce new raw materials with good mechanical properties and a superior environmental footprint over products.
The devulcanization of waste ground rubber tire (GRT) is typically done by shearing the material at very high temperatures (150-200°C) with or without the aid of chemicals in a twin-screw ...
Waste tire rubber is a toxic, non-biodegradable material making its disposal an environmental and economical problem. Ultrasonic devulcanization is a fast and efficient method to recycle waste tire rubber allowing to reuse waste tires. Ultrasonic tire rubber recycling is relatively simple process, which has been successfully tested.
This invention is based upon the unexpected discovery that cured rubber can be devulcanized by heating it to a temperature of at least about 150° C. under a pressure of at least about 3.4×10 6 Pascals in the presence of 2-butanol. The molecular weight of the rubber can be maintained at a relatively high level if the devulcanization is carried out in the presence of the 2-butanol at a ...
Today tires consist of about 19% natural rubber and 24% syntheti … Current progress in waste tire rubber devulcanization Chemosphere. 2021 Feb;265:129033. doi: 10.1016/j.chemosphere.2020.129033. Epub 2020 Nov 20. Authors Ricky Saputra 1 ...
A promising approach to the material recycling of waste tires is reclaiming [5–7]. Reclaiming of ground tire rubber (GTR) (sometimes called "devulcanization" in the literature) consists in the destruction of the cross-linked structure involving cross-link scission and degradation of polymeric chains.
Devulcanization offers a route to recycling end-of-life tires back into high value-added products, so that natural and synthetic rubber can be partly replaced and saved with economical and environmental benefits.
Devulcanization of ground tire rubber: thermo-oxidation followed by microwave exposure in the presence of devulcanizing agent Iranian Polymer Journal ( IF 1.899) Pub Date :, DOI: 10.1007/s13726-020-00818-4
Biological devulcanization of ground tires (GTs) was evaluated by eleven different bacteria belonging to the genera Thiobacillus, Gordonia, Nocardia, Amycolaptopsis and Pseudomonas. The GTs were treated by each bacterium in a mineral medium and devulcanization was measured by increasing the sulfate of the medium and decreasing the sulfur of the GTs. The effects of incubation …
