Creep Test of Rubber Materials (JIS K6273 and ISO 2285) - Creep Test of Rubber Materials (JIS K 6273, ISO 2285)

Introduction

Rubber is an extremely familiar material that has characteristic mechanical properties such as elasticity and stretchability and is widely used in a variety of industrial and consumer products, particularly in applications that require vibration-proofing or shock-absorbing functions. Synthetic rubber now accounts for the majority of rubber materials. Because a diverse range of unique synthetic rubber products suited to specific applications have been developed, evaluation of the mechanical properties of these materials is extremely important. Creep characteristics can be mentioned as one mechanical property that requires evaluation. Creep is a phenomenon in which deformation of a material gradually progresses when a constant load is applied continuously for an extended time, and is a cause of malfunction or failure of industrial products in long-term use in some cases. Thus, in order to estimate the useful life of a rubber material based on the intended application or to select a fit-for-purpose material, an understanding of the creep characteristics of rubber materials is needed in the development design stage. This article introduces an example of an evaluation of creep characteristics by tensile test of chloroprene rubber, which has excellent weatherability, oil resistance, and heat resistance and is most widely used as a representative synthetic rubber. This test was conducted referring to JIS K 6273, ISO 2285 (Rubber, vulcanized or thermoplastic – Determination of tension set, elongation and creep) using a Shimadzu Autograph AGX^TM-V model Precision Universal Testing Machine. This material testing system is also suitable for creep test, as it provides higher test force holding performance than conventional testing machines.

March 3, 2020 GMT