Prepainted Steel Sheets: Category and film thickness of primers
2023年1月17日
Prepainted Steel Sheets: Category and film thickness of primers
Category and film thickness of primers
The category of the primer includes epoxy, polyester, acrylicacid, polyurethane, etc. In general, the primer is chosen in accordance with the usage,environment condition, processing stage and finish coat. Thefilm thickness ofthe primer is usually 5-7 um.
(1) Epoxy primer
The epoxy primer has a strong adhesion to the base metal and good properties in waterproof, alkali-proof andchemical resistance, which is the original primer for thecoiled steel, having a poorer flexibility than that of otherprimers.
(2) Polyester primer
The primer has strong adhesion to the base metal andexcellent flexibility, which is relatively sensitive to dampenvironment and has a chemical resistance poorer thanthat of epoxy primer.
(3) Water-soluble acrylic acid primer
The primer of this kind has strong adhesion, excellentflexibility, lower organic solvent and low-temperature curing.
(4) Polyurethane primer
The primer of this kind has excellent chemical resistancedurability and flexibility.
- Get In Touch: +86-18115459757
