Material Selection for Rotational Moulding Process Using Grey Relational Analysis Approach

Rotomoulding is an emerging industry of present era for manufacturing hollow plastic products of various sizes. Different materials like polyethylene, polypropylene, polyvinylchloride, polycarbonate etc. are used in rotational moulding. As vast variety of materials with diverse physical and mechanical characteristics is available, choosing the best suitable material becomes a challenge. Rotomoulder has to take into account a large number of material selection criteria before arriving at the final decision, otherwise there may be premature failure of the product during its operation. In order to assist the rotomoulder, this paper presents a systematic and efficient multi attribute decision-making approach referred as grey relation analysis for material selection in rotational moulding. In order to elaborate the above said procedure eleven alternatives are evaluated against seven criteria. From the analysis suitable material has been identified. (C) 2018 Elsevier Ltd. All rights reserved.