Surface bonding of workpiece of PUR flat pasting machine
The surface of the covered workpiece is folded and not smooth or PUR flat pasting machine the corner cannot be wrapped: the film is not straightened, the film quality is not good, the workpiece is not polished well, too much glue is sprayed, and the template under the workpiece is too low. When the coating is not reached, the film is pulled down: whether the solenoid valve or hand valve is open.
Drama breaking phenomenon: the temperature is too high, the heating time is too long, the film quality is not good, and there is no heating.
There is a bad situation of sticking to the table
1. Improper selection of adhesive, improper setting of gluing amount and wrong proportioning measurement. The type and amount of adhesive shall be re selected.
2. The diluent contains alcohol and water that consume NCO group, so that the hydroxyl group of the main agent does not react. High purity ethyl acetate shall be used.
3. There is powder spraying on the surface of the printed matter. Wipe gently with a dry cloth.
4. Printing ink layer is too thick. The arrangement of adhesive coating shall be increased to increase the pressure.
5. The ink layer of printed matter is not dry or completely dry. It shall be hot pressed before gluing; Select adhesives PUR flat pasting machine with high solid content; Increase the adhesive coating thickness; Increase the temperature of drying channel, etc.
