| 摘要 |
<p>Biodegradable ink composition for ink jet printing, liquid at room temperature, comprising: a) a binder comprising at least 0.5% by weight relative to the total weight of the ink, of at least one biodegradable polymer having a weight average molecular weight less than 70 kDa, preferably less than 60 kDa, more preferably less than 50 kDa, further preferably less than 40 kDa, expressed as polystyrene equivalents; b) an organic vehicle or solvent comprising, preferably composed of, one or more organic solvent compound (s), and optionally water; c) at least 0.1% by weight relative to the total weight of the ink of one or more dye(s) and/or pigment (s); wherein the biodegradable polymer is chosen from among polyhydroxyalkanoates (PHA), polyesteramides (PEA), poly (glycolic acid) s, poly (lactic acid) s (PLA), polycaprolactones (PCL), the copolymers thereof; and aliphatic copolyesters such as succinates, adipates and terephtalates; and wherein the ink composition has a viscosity of 1 to 20 mPa.s, preferably of 2 to 10 mPa.s at 20°C. Process for marking a substrate using said ink composition. Substrate provided with marking obtained by drying and/or absorption of said ink composition.</p> |
