Compression stress tester.
The company's compression stress relaxometer measures the ability of an elastomer to seal efficiently when held in compression over time between two rigid faces. The stress at the interface between the elastomer and the rigid faces is important for efficient sealing and is a function of the modulus of the elastomer and the strain applied, according to the company. In the stainless steel jig, the test sample is compressed by a fixed strain (typically 25%) between two flat parallel faces for the duration of the test. One face can be adjusted to accept different height samples, while the other is mounted in a frictionless manner, allowing the force exerted by the sample to be accurately determined, according to the company. The stress at the interface between the test piece and the jig is measured using the company's force measuring instrument, the compression stress relaxometer. (Wallace Instruments)
Circle 109 on card