PVDF Coated Coil

The substrate is the "skeleton" of the coated coil, determining its strength and basic corrosion resistance.

Substrate Type
Galvanized Steel (GI)
Galvalume (GL/55% Al-Zn)
Stainless Steel

Substrate Thickness
Conventional Range: 0.3mm ~ 1.5mm
Commonly used in construction: 0.4mm ~ 0.8mm

Coating Weight (Coating Mass)
Unit: g/m² (Total both sides)
Galvanized (GI): e.g., 60/60, 75/75
Galvalume (GL): e.g., 50/50，75/75

The coating is the core of the PVDF-coated coil's performance.

Coating Structure
Two Coats Two Bakes (2C2B): Primer + Topcoat
Three Coats Three Bakes (3C3B): Primer + Topcoat + Clear Coat (Protective Varnish)

Coating Thickness
Unit: μm (micrometers) usually refers to the total thickness per side.
Conventional Requirement: ≥ 25μm
High Standard Requirement: Topcoat ≥ 20μm, total thickness up to 30μm or more.

Color & Surface Finish
Color: Customizable per Pantone, RAL, etc.

Gloss
Low Gloss: 10° - 30° (Matte)
Medium Gloss: 40° - 60° (Satin/Silk)
High Gloss: ≥ 70° (Glossy)
Coating Texture: Smooth, Fine Texture, Orange Peel

These parameters are obtained through laboratory tests to quantify their performance.

Weathering Resistance
QUV Accelerated Weathering Test: Typically ≥ 2000 hours without blistering/cracking/peeling, ΔE≤2.0, Gloss Retention ≥85%.

Chemical Resistance
Resistance to Acid & Alkali: Good performance in hydrochloric acid and mortar tests.

Mechanical Properties
Pencil Hardness: ≥ F (Typically H or 2H)
T-Bend: 2T - 4T
Reverse Impact: ≥ 9J

Adhesion
Cross-Cut Test: Class 0 (Best)