Basic requirements for coatings commonly used in containers
| Basic requirements for coatings commonly used in containers | |||||||
| serial number | project | Primer | Intermediate paint | Interior paint | exterior paint | Modified epoxy base paint | |
| 1 | state in the container | No hard lumps after stirring, in a uniform state | |||||
| 2 | Coating Appearance | Flat and no abnormality | |||||
| 3 | Coating color | - | - | The color difference conforms to the standard sample range, △E≤2 | - | ||
| 4 | Fineness μm | ≤60 | ≤60 | ≤60 | ≤40 | ≤70 | |
| 5 | recoating interval min | ≤3 | ≤5 | - | - | - | |
| 6 | Semi-hard drying time (baking at 80°C) min | ≤5 | ≤15 | ≤15 | ≤15 | - | |
| 7 | Volume Solids % | ≥45 | ≥50 | ≥50 | ≥40 | ≥65 | |
| 8 | Non-volatile content% | ≥70 | ≥60 | ≥70 | ≥45 | ≥70 | |
| 9 | Adhesion level (artificial radiation exposure 600h) | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | |
| 10 | Bending cracking resistance (artificial radiation exposure 600h)mm | ≤3 | ≤3 | ≤3 | ≤3 | ≤3 | |
| 11 | Impact resistance (artificial radiation exposure 600h) kg`cm | ≥50 | ≥50 | ≥50 | ≥50 | ≥40 | |
| 12 | Zinc powder content C % | one type | 65≤C＜77 | ||||
| 13 | Class II | 77≤C＜85 | |||||
| 14 | Three categories | C≥85 | |||||
