| 摘要 |
The present invention addresses the issue of providing an ink composition for photocurable inkjet printing, that has: good curing properties in a thin film when being cured by using ultraviolet rays, in particular ultraviolet rays having a light-emitting diode (LED) as a light source therefor; and good adhesiveness, solvent resistance, scratch resistance, discharge stability, and storage stability for polyvinyl chloride sheets, etc. The ink composition for photocurable ink jet printing has a viscosity of no more than 100 mPa·s at 25°C and contains a photopolymerizable component and 3%-20% by mass of an acylphosphine oxide-based photopolymerization initiator relative to the total mass of the photopolymerizable component, said photopolymerizable component not substantially including vinylformamide and containing, relative to the total mass of the photopolymerizable component: 0.1%-20% by mass of an ether group-containing monofunctional monomer; 65%-85% by mass of an cyclic structure-containing monofunctional monomer; 0.1%-25% by mass of an amino group-containing monofunctional monomer; and 5%-35% by mass of a trimethylol propane skeleton. |
