Defects in layered materials

Layered polymeric materials are widely used when receiving thermomoulded articles from thermolayers. Often in such products materials with addition of secondary polymer, and also mixtures polymeric compositions are used. It is connected with that increase in production of plastic products causes need of utilization of the fulfilled products from them. In this work such defects as peelings and cracks, layered products of practical use, namely bathtubs made by a combination of methods of thermoforming sheets of coextruded ABS plastic to polymethyl methacrylate and contact formation by putting premix on them were investigated. Results of research of the samples presented showed truthfulness of the assumption that as raw materials at production of sheets secondary materials were used that led to defect in finished products in the form of stratification and crack.