1, Standard proportation: main adhesive： firming agent=10：2. When the air moisture is more than 80%, the firming agent should be added properly during polyurethane ink brush mark.
2, Dilution: adding ethyl acetate in main adhesive.
3, The change of work concentration and viscosity diluted by ethyl acetate is shown as the picture.
| PU-1850A（kg） |
PU-1850B（kg） |
Ethyl acetate（kg） |
Work concentration（%） |
Viscosity （s） |
| 10 |
2 |
10.5 |
40 |
21-23 |
| 10 |
2 |
13.7 |
35 |
17-19 |
| 10 |
2 |
18.0 |
30 |
14-16 |
| 10 |
2 |
20.1 |
28 |
13-15 |
| 10 |
2 |
24.0 |
25 |
12-14 |
4, Glue spread calculation formula: dry glue spread (g/m2 ) =1/5～1/6×work concentration%×net depth, including 1/5～1/6 percent conversion.
5, Glue spread amount: complex dry glue spread can be chosen between 2.5-3.5g/m2 and the recommended work concentration is about 35%.
6, Dry：In order to promote solvent volatilization in foil glue, try to increase dry efficiency of compounding machine.
7, Lamination：Try to increase complex hot quinine temperature and pressure and the hot quinine temperature can be chosen between 50～90℃.
8, Curing：After composition, it should be sent to curing room as soon as possible. Under the 50±5℃ condition, curing for 48 hours can achieve prospective strength. |
