Solve the composite film adhesive 'don't', it is important to pay attention to this problem

In the process of composite bags, adhesive and other Don't be & throughout; Is a common problem. Generally speaking, the reason has the following: 1, the dosage of curing agent; 2, too much water in the solvent; 3, curing temperature is low or insufficient curing time; 4, film suction ( PA) ； 5, printing ink layer water or alcohol; 6, ink connection of hydroxyl more. In practical production, if a flexible packaging plant for their use of ethyl acetate by the level of the water, alcohol, some can be offset by increased dosage of curing agent water in the solvent, the influence of alcohol, ensure the adhesive fully cured. In order to help people more clearly to judge this problem, small make up hereby summarizes the excess water in the solvent, alcohol on composite products form, for reference only. 1, in, has wrinkled surface film ( Excessive additives have the similar phenomenon of the film) ； 2, in the cover material with ink has wrinkled, After heating, the inner layer thin film thermal shrinkage rate is too high also has the similar phenomenon) ； 3, in a composite membrane separation; 4, curing process, the composite membrane have ink appear bubbles.