name the plastic which is used in making helmet
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The conventional motorcycle helmet has two principal protective components: a thin, hard, outer shell typically made from polycarbonate plastic, fiberglass, or Kevlar and a soft, thick, inner liner usually made of expanded polystyrene or polypropylene "EPS" foam.
Today's plastic football helmets are made from molded polycarbonate shells with foam padding (either polyurethane, polystyrene, polypropylene, or ethylene vinyl acetate) inside.
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ABS (Acrylonitrile Butadiene Styrene)
Because ABS plastic is chemical- and heat-resistant and offers good protection against dents, it's widely used in helmets.
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