LIFE EVALUATION METHOD OF RUBBER SEAL MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a life evaluation method of a rubber seal material capable of evaluating highly accurately the life of the rubber seal material by pulse method NMR.;SOLUTION: In a life evaluation method of a rubber seal material, a spin-spin relaxation time T₂ of the rubber seal material is measured by pulse method NMR. An obtained T₂ relaxation curve (free induction decay curve) is divided into a T₂^S component having a short relaxation time and a T₂^L component having a long relaxation time, and the life of the rubber seal material is evaluated based on T₂^S.;COPYRIGHT: (C)2015,JPO&INPIT