One of the biggest challenges with density analyses involving foams is compression. Determining the skeletal and envelope density of a foam must be performed in a manner where material compression is not significant. ASTM D6226 requires foams to be analyzed, with a gas pycnometer, at a pressure of 2.9 PSIG (20 kPa) and it is common practice to go up to 3.5 PSIG (24.13 kPa). The GeoPyc compresses DryFlo around the sample with a specified force called the consolidation force. The default consolidation force changes with each chamber size: 12.7mm, 19.1mm, 25.4mm, 38.1mm, and 50.8mm.
One of the biggest challenges with density analyses involving foams is compression. Determining the skeletal and envelope density of a foam must be performed in a manner where material compression is not significant. ASTM D6226 requires foams to be analyzed, with a gas pycnometer, at a pressure of 2.9 PSIG (20 kPa) and it is common practice to go up to 3.5 PSIG (24.13 kPa). The GeoPyc compresses DryFlo around the sample with a specified force called the consolidation force. The default consolidation force changes with each chamber size: 12.7mm, 19.1mm, 25.4mm, 38.1mm, and 50.8mm.
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