ULTRAVIOLET HARDENING-TYPE PRESSURE SENSITIVE ADHESIVE AND SHEET FOR PRESSURE-SENSITIVE ADHESION PRINTING USING THE ADHESIVE

摘要

PROBLEM TO BE SOLVED: To provide an ultraviolet hardening-type pressure sensitive adhesive capable of being uniformly applied by a gravure offset method without the trouble of the swelling of an edge part at a specific spot on the overlaying face of a basic sheet and capable of adhering overlapped faces under a condition capable of delamination by pressurizing the overlapped faces opposed to each other to make them come closely into contact, and to provide a sheet for pressure-sensitive adhesion printing by using the adhesive. SOLUTION: This ultraviolet hardening-type pressure sensitive adhesive comprises a photopolymerizable acrylic oligomer not having adhesiveness or having sufficiently slight adhesiveness, a photopolymerizable acrylic monomer and a photopolymerization initiator. Particulary, an oligomer not having adhesiveness or having sufficiently slight adhesiveness is used as the photopolymerizable acrylic oligomer together with the photopolymerizable acrylic monomer and the pressure sensitive adhesive is adjusted in such a way as to have a viscosity of 300-600 mPa.s.