We are given the assignment to recap on the material selection of a topic that we have learnt in our Year One Module - Material for Design (MFD).
We have been tasked to select materials for a single-use (disposable) water bottle that does minimal environmental harm. What materials will you select? Apply the materials selection technique explained in the above example.
Plastic water bottle components:
Bottlecap
The body
Based on this, the selected material is (HDPE) High-Density Polyethylene.
Reason: We chose (HDPE) High-density Polyethylene as the most suitable material as it has high chemical resistance, low ductility, high heat resistance and fairly decent ultimate tensile strength, thus earning the second-highest score of 200% after Polyvinyl chloride at 275% and Polypropylene at last with 125%. However (HDPE) High-density Polyethylene is a more economical material compared to Polyvinyl Chloride and Polypropylene. Despite all three of the materials being cheap in cost per kilogram, (HDPE) High-density Polyethylene is easier to handle than Polyvinyl chloride and Polypropylene and earning the highest score of 210% compared to Polyvinyl chloride and Polypropylene to the other two materials. Therefore (HDPE) High-density Polyethylene is the most suitable material as it fulfils the requirements and the main objective of the task of being a material for a single-use (disposable) water bottle that does minimal harm to the environment.
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