Abstract
An important problem that arises at present refers to the increase in performances in the exploitation of the conveyor belts. Additionally, it is pursued to use some materials, which can be obtained by recycling rubber and PVC waste, in their structure. Thus, the research aimed at creating conveyor belts using materials obtained from the recycling of rubber and PVC waste. Under these conditions, conveyor belts were made that had in their structure two types of rubber and PVC, which was obtained by adding in certain proportions of reclaimed rubber and powder obtained from grinding rubber waste. In order to study the effect of adding PVC on properties, four types of conveyor belts were made, with the structure of rubber, PVC and textile reinforcement. These have been subjected to certain mechanical tests, also being analyzed from the point of view of the behavior of the accelerated aging. The results obtained showed that the addition of PVC lead to a decrease in tensile stress for the strips made, but also an increase in the tensile strain. Additionally, the elasticity tests performed before and after the accelerated aging showed that the presence of PVC in the structure of the conveyor belts determined a substantial reduction of the aging process of the rubber in the conveyor belts. Under these conditions, it has been established that the use of PVC in the structure of rubber matrix conveyor belts is beneficial if conveyor belts are to be produced that are less subject to mechanical stress, but that work in conditions that can cause accelerated aging of materials. An analysis with the finite element method (FEM) of the test samples was also performed.
Highlights
The recycling of rubber waste represents a problem that must have an optimal solution from a technical and economic point of view
The new microstructure of the conveyor belts determines their different behavior at the tensile stress, and from the point of view of preserving their properties after the application of an artificial aging process by thermal shocks
The use of layers and shell elements presents a disadvantage in the current situation, because at these elements the through-thickness component is set to zero
Summary
The recycling of rubber waste represents a problem that must have an optimal solution from a technical and economic point of view. It is necessary to find another way to reduce the waste stock of rubber products and PVC, by making a new material By recycling these types of materials and adopting appropriate technologies, composite materials with superior characteristics can be obtained. For their development with various applications, 3D printing technology can be used, in these conditions, the modified polymer having a series of advantages associated with rapid prototyping [1]. This technology can be a solution to obtain high-performance composite materials with rubber matrix and PVC additives. Composite materials with a recycled PVC matrix mixed with
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