Research on the effects of photoinitiators on curing speed of UV ink

To improve the curing speed of UV ink,effects of hydroxyl alkyl phenyl ketone 1173,amino alkyl phenyl ketone 907,acyl phosphate oxide 819,benzophenone BP,thioxanthone ITX and their complex to the UV ink are discussed.Results showed that when the concentrations of photoinitiator,pigment and monomers are respectively 2%,4%,30%,curing time of photoinitiator 1173 and photoinitiator BP is respectively 20.88 s and 70.56 s.Curing time of photoinitiator of 907 is 7.14 s.Curing time of the photoinitiator 819 and photoinitiator ITX is around 1.5 s.When the ratio of photoinitiator 1173 to photoinitiator BP is 1 ∶3,curing speed is 4.9 times of photoinitiator BP.Curing speed is 4.3 times of photoinitiator BP,as the ratio of photoinitiator 907 to photoinitiator BP is 1 ∶3.When the ratio of photoinitiator 907 to photoinitiator ITX is 1 ∶1,curing speed is 2.3 times of photoinitiator 907.