In quality control, manual, analog methods often persist for a very long time, even when more modern technologies are available. This also applies to the still widespread ink tests in the field of activation control of polymers, which are only now gradually being replaced by contact angle measurements.
In this context, a value of 38 mN/m (dynes) has been established as a universal pass criterion for QC tests, which was determined over 50 years ago for polypropylene with organic coatings. This is problematic because if the ideal value for a different combination of substances is higher, adhesion problems often occur. As the tests have supposedly been passed, the cause is often not discovered for a long time.
Our whitepaper shows what modern quality control can look like. Read about the advantages of switching to contact angle measurements. Preliminary investigations can also be used to replace the traditional target value of 38 dyne with a value that is suitable for the specific process.
