Improvement of the Shock Absorption Ability of a Face Guard by Incorporating a Glass-Fiber-Reinforced Thermoplastic and Buffering Space

Figure 2

(a) Schematic diagram of the shock absorption test equipment. The experimental force of impact was applied by a free-fall drop and impact-testing machine (modified IM-201, Tester Sangyo Co., Saitama, Japan), which consisted of a free-falling object (500 g) and a vertical rod. Shock absorption performance was comparatively assessed under the two combinations of examination materials. (b) Photograph of the vertical rod.