a synthetic resin which is a polymer of propylene, used chiefly for films, fibres, or moulding materials
a synthetic polymer of a type made by the linkage of an amino group of one molecule and a carboxylic acid group of another, including many synthetic fibres such as nylon.
a synthetic resin which is a polymer of propylene, used chiefly for films, fibres, or moulding materials
a synthetic polymer of a type made by the linkage of an amino group of one molecule and a carboxylic acid group of another, including many synthetic fibres such as nylon.