... of materials typically used in impact helmets and protective sport equipment to a series of impacts. ... impacts (e.g., bicycle and motorcycle) these typically use EPS liners, ...
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T. Blaine Hoshizaki, PhD
D. Gordon E. Robertson, PhD, FCSB
Andrew Post, MSc
School of Human Kinetics
University of Ottawa, Ottawa, Canada
This study investigated the impact characteristics of materials typically used in impact helmets and protective sport equipment to a series of impacts. The materials included several foams (vinylnitriles) and one each of a Expanded Polypropolene (EPP) and a Expanded Polystyrene (EPS). The purpose was to determine whether the attenuating properties of the materials remained consistent after a series of impacts. Certain helmets are designed to withstand single impacts (e.g., bicycle and motorcycle) these typically use EPS liners, the latter are assumed to be more durable; others helmets are intended for repeated impacts (e.g., football) these use vinylnitrile, EPP and EPE.
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