Ethyl to composite film quality is good, pick the key!

In the process of composite flexible packaging materials processing, adhesives & other; Don't be & throughout; Is a common problem. It is a variety of reasons, and ethyl choose quality will also have an effect. Adhesive & other; Don't be & throughout; Reason 1. Dosage of curing agent; 2. Too much water in the solvent; 3. Curing temperature is low or insufficient curing time; 4. Membrane water absorption; 5. Ink layer water or alcohol; 6. Material of hydroxyl more ink connection. Ethyl acetate to adhesives & other; Don't be & throughout; We all know: the influence of water and alcohol and curing agent in the reaction between isocyanate and will consume the amount of curing agent problem. If a flexible packaging material processing enterprises 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. If you don't know anything about the quality level of ethyl acetate used, it is easy to appear adhesive & other; Don't be & throughout; The quality problem. Water in the solvent, excess alcohol form 1 on the composite products. In, surface membrane wrinkling ( Thin film in the phenomenon of excessive additives have ketone) ； 2. In the cover material with ink fold ( 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.