エポキシ樹脂の架橋密度操作に基づく柔軟性スポーツ用プロテクターの開発

抄録

In many sports, collision with a ball or other player causes injury in a player. Therefore, protectors with hard outer shell have been widely used. Generally, hard protector has a layered structure, consisted by hard outer shell and soft inner shell. When a protector is subjected to a collision, the outer shell compresses the inner shell uniformly without local deformation, preventing excessive impact force to human body. In this study, a flexible protector having an outer shell hardening only under impact due to time dependency of elastic modulus of epoxy resin. To control the time dependency, a crosslinking density of resin was changed. Prototype flexible protectors were designed based on the time dependency of elastic modulus, and flexibility and impact absorption characteristic of the protector were evaluated.