Abstract
The purpose of this study was to provide a test method for gel retention performance of nonwoven filters for UV curable ink jet inks. Gel marked with elemental silver was formed from simulated UV curable ink. The silver marked gel was dispersed in the simulated UV curable ink by ultrasonic vibration. Large size gels were removed by pre-filtration with a track-etched membrane filter which had uniform 10 μm round shaped pores. Then the ink was subjected to filterability test to determine gel retention. Mass of silver element accumulated on filter medium was measured by ICP-MS after filter medium was dissolved in hot acid.Gel retention performance of nonwoven filters was compared as demonstration of effectiveness of this method. Characteristics of the gel in dynamic viscoelasticity, size and silver element release were investigated as well.
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