How to Perform MFR of Polyamide Grades?

09 July 2025 1 10K Report

So I have samples of PA 6, PA 6, 10 and PA 12. I have pre dried the samples and I use Nitrogen but the ISO standard which prescribes 275 deg C at 5kg weight just causes the PA to flow like water. I tried 235 deg C at 5kh and it doesn't melt. Does anyone know what condition I can follow?

Dr S Yamunadevi

pre dry at 80 to 120 deg c for 6 hrs nylon is hygroscoping in nature. nylon 6 u can adopt 235 deg c and 2.16kg load perform the test ASTMD 1238

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