A urethane bumper spring is produced from a urethane raw material containing a polyester-based polyol as a polyol component and diphenylmethane diisocyanate as an isocyanate component, and includes: a skin layer; and a core portion, in which the skin layer has a density (Da) and a foamed cell diameter (Ra), and the core portion has a density (Db) and a foamed cell diameter (Rb). The density (Da), the foamed cell diameter (Ra), the density (Db), and the foamed cell diameter (Rb) satisfy relationships shown in the following expressions: 1.0≦Da/Db<1.34 (1) and 0.53
URETHANE BUMPER SPRING, AND METHOD FOR PRODUCING SAME
2016-12-01
Patent
Electronic Resource
English
SAE Technical Papers | 1972
|An integrated high performance bumper concept using urethane
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|An Integrated High Performance Bumper Concept Using Urethane
SAE Technical Papers | 1984
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