high speed screen printing ink composition, printed matter obtained through high speed screen printing ink composition and method of producing printed matter

摘要

The invention relates to a high quality, high resolution and high speed screen printing ink composition which makes it possible to produce screen printed material where the edge spreading width of a printed image is within 10 µm relative to the design dimensions of the printed image of a printing plate where the printed article is produced by high speed screen printing on a printing substrate at a roll speed of 400 mm / second using a screen printing plate made by flat machining a photosensitive emulsion film on a polyester mesh printing plate having 355 mesh / inch. The high speed screen printing ink composition is characterized in that 70% or more of the total weight solvents are a solvent having a boiling point of 170 ° C or more, 7% or more of the total amount of the ink composition is a prepolymer or a polymer having a weight average molecular weight of 2,000 or more, the viscosity at 25 ° C according to a bh type rotary viscometer is 6 pa.s or more but less than 30 pa.s the thixotropic index (ti value) is 2.0-8.0 and the measured flowrate value of the ink composition is one minute after the start of measurement by a method where flow is measured by means of a parallel plate viscometer (a flow meter). at 25 ° C according to jis k5701-1: 2000 is 14.0-24.0 mm.