ANALYSIS OF MECHANICAL PROPERTIES OF POLYAMIDE DEPENDING OF THE GRIND PERCENTAGE OF MATERIAL

This paper presents the influence of the grind percentage over mechanical properties, obtained by mold injection of various articles in the automotive industry, made of polyamide 6.6. The specimens were made with the following composition: 100% new material, new material 80% + grind 20%, new material 60% + grind 40%, new material 40% + grind 60%, new material 20% + grind 80% and grind 100%. Mechanical properties were carried out using the methods of determining the tensile properties and determining the Izod impact properties. It was found that shock resistances decrease with increasing of grind percentage and tensile strength increases with increasing of grind percentage.