Technical Paper - Tests were carried out to examine the effects of variations in photoinitiator type and UV dose on the properties of a UV-curable , solventborne acrylic pressure-sensitive adhesive formulation. Six Type II free radical photoinitiators, which operated via hydrogen abstraction, were evaluated. The tack of the adhesives decreased steadily from the lowest photoinitiator concentration and curing time, while the shear strength increased steadily. The peel adhesion, however, reached a maximum which was dependent on the photoinitiator type, level and curing cycle. The best balance of the three key properties, i.e. tack, shear strength and peel adhesion, was obtained when using 0.6-1.0% Michlers ketone.
加载中...
