Pre-painted steel coil(PPGI,PPGL)
is the coil coated steel sheet (galvanized, zincalumed, cold plate, etc.) after surface chemical treatment (degreasing, phosphating, and chromium hydrochloric acid passivation) and coated (roller) with coatings, again baking to forming. It has both the mechanical strength of steel plate and easy molding performance, and the good decorative performance and corrosion resistance. Color coated plate has strong layer adhesion which could keep fresh color for a long time, so it is widely used in building, home appliances, home furniture, public facilities and transportation fields.
Process Flow
Basic Parameters
| Standard | AISI, ASTM, BS, DIN, GB, JIS,etc. |
| Steel Grade | DX51D-S550GD, G2-G550, CGCC,CGCH,CGLCC,CGLCH |
| Nominal Thickness(mm) | 0.14~1.5 |
| Nominal Width(mm) | 20~1250 |
| Coil ID(mm) | 508 |
| Coil Weight(Tons) | 2-10 |
| Substrate Steel | Hot-dip Galvanized Steel/Galvalume Steel/Cold Rolled Steel |
| Color | RAL Code or by Client's Requested |
| Paint Thickness | Top side:17-25um, Back side:5-10um |
| Coating Structure | 2/1 or 2/2 coating |
| Application | Building industry ,structural use, roofing, commercial use, household appliance, industry facilities, office buildings |
| The special order can be negotiated | |
Performance of color coating layer
| Coating types | Thickness (μm) | Pencil hardness | 60°specular glossiness of coating | Bending | Impact (J) | Saltfog resistant (h) | ||
|---|---|---|---|---|---|---|---|---|
| Low | Medium | High | ||||||
| polyester (PE) | ≥20 | ≥F | <40 | 40-70 | >70 | ≤3T | ≥9 | ≥500 |
| Silicon Modified Polyesters (SMP) | ≥20 | ≥F | <40 | 40-70 | >70 | ≤3T | ≥9 | |
| High-durability Polyester (HDP) | ≥20 | ≥HB | <40 | 40-70 | >70 | ≤3T | ≥9 | ≥1000 |
| Polyvinylidene Fluoride (PVDF) | ≥20 | ≥HB | <40 | 40-70 | >70 | ≤3T | ≥9 | ≥1200 |
Other Parameters
| Project | Result |
|---|---|
| Glossiness | Low,Medium,High |
| Pencil Hardness | ≥H |
| T bending | 0T |
| Impact | ≥9J |
| Heat Resistance | 150℃*3Hrs,no fading |
| Humidity Resistance | 50℃*98%RH*1000Hrs, no bubble,no break off |
| Saltspray Corrosion | 500Hrs,no bubble |
| Acid Resistance | 5%HCL,25℃*3Hrs, no bubble,no break off |
| Alkali Resistance | 5%NaOH,25℃*24Hrs, no bubble,no break off |
| Water Resistance | 40℃*1000Hrs, no bubble,no break off |
| Boiling Water Resistance | 100℃*1Hr, no bubble,no break off |
