| 摘要 |
<p>PURPOSE:To provide a printing ink for laminate having excellent adhesive property and improved lamination adaptability by using vehicle of acrylic copolymer having carboxylic gp. and hydroxyl gp. CONSTITUTION:An ink composition contains vehicle ingredient essentially consisting of acrylic copolymer having both functional gps. of carboxylic gp. and hydroxyl gp. Application of an acrylic copolymer having acid value of 5-30 and hydroxyl value of 5-30 is preferable. If acid value is less than 5, extrusion lamination workability becomes poor; if acid value exceeds 30, the cohesive force of polymer rises and adhesive property as well as water resistance decrease, and therefore its use is not preferable. Hydroxyl value below 5 renders the adaptability to dry lamination poor, and hydroxyl value exceeding 30 deteriorates water resistance and wrinkle resistance, and thus makes ink property poor.</p> |
