Compression set
The compression set (
Compression Set A
This has the formal name compression set under constant force in air. In compression set A a force of 1.8
Compression Set B
This has the formal name compression set under constant deflection in air. The specimen is compressed to 75% of its original height for a set time and at a set temperature (sample is compressed to .75 of its original height). Compression set B is (like Compression set A) defined as the percentage of specimen deflection after it has been left in normal (uncompressed) conditions for 30 minutes. CB, the compression set B is given by CB = [(to - ti) / (to - tn)] * 100 where to is the original specimen thickness, ti is the specimen thickness after testing and tn is the spacer thickness or the specimen thickness during the test.[2]
References
- S2CID 263769377.
- ^ a b c "Compression Set - ASTM D395 Plastic Test Standard". IDES. Integrated Design Engineering Systems. Archived from the original on 28 December 2011. Retrieved 15 June 2012.