1. Rationale
Work item will investigate compression set testing and attempt to answer the following questions: 1.ASTMD 3574 does not specify the type or thickness of material used for compression plates. a.Does the composition of the plates (plastic, aluminum, steel, etc) affect the compression set results? b.Should there be a standard for the composition and thickness? 2.ASTMD 3574 does not specify whether the condition of the plates is significant. a.Does the condition of the plates (machined, painted, scratched, corroded, etc) affect the compression set results? 3.ASTMD 3574 does not specify whether the samples sticking to the plates is significant. a.If the sample does not easily release from the plates, does it affect the compression set results? b.Should the sample be cut/scraped from the plates? c.Should a new sample be tested? d.Can anything be added to the plates (powder, lubricant, etc.) to alleviate sticking? 4.ASTMD 3574 does not specify how the samples should be prepared. a.Should the sample be saw cut, die cut, etc? b.Is it significant? 5.ASTMD 3574 does not specify whether the samples should or could be subject to a preflex. a.Should/could the sample be preflexed? To what %? b.Should a new sample be tested?
Keywords
bonded; flexible cellular; molded; slab; urethane; Compression testing--rubber; Deflection--plastics; Density--rubber; Urethane foam; Elongation--plastics; Fatigue--plastics; Flexible cellular materials; Foam rubber; Indentation residual deflection force (IRDF); Molded urethane foam; Resilience--impact; Roller shear dynamic flex fatigue apparatus; Slab/bonded/molded urethane foams; Tear resistance; Tensile properties/testing--rubber/relatged materials; Accelerated aging/testing--rubber/related materials; Airflow resistance; Ball rebound test; Bonded urethane foam;
Citing ASTM Standards
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