Riso Kagaku Corporation

Kazuhiro Higashi

Kokoro Kinoe

Hiroyuki Ogawa

Hajime Tsunoda

A water-in-oil emulsion adhesive, which is composed of an oil phase and a water phase, wherein the water phase comprises a water-soluble polymer that functions as an adhesive component, the oil phase comprises a non-aqueous polar solvent having an SP value of 8 to 12 (cal/cm), and the oil phase comprises a resin that is solid at 30&#xb0; C. and has an acid value of 10 or less, in an amount of 5 to 15% by mass relative to a total mass of the adhesive.

Water-in-oil emulsion adhesive

An ink for inkjet printing including a pigment, a water-dispersible resin, water, and a water-soluble organic solvent, wherein the water-dispersible resin is an anionic resin having a film elongation of 400-1,000%, a tensile strength of 20 to 50 N/mmand an absolute value for the zeta potential (mV) of 40 or greater, the amount of the anionic resin, reported as a weight ratio relative to the pigment, is within a range from (0.5 to 2.5)/1, and the surface tension of the ink is within a range from 30 to 50 mN/m.

Growing community of inventors

Ibaraki-ken, Japan

Kazuhiro Higashi