Professional Supplier of Coatings
PVDF fluorocarbon coatings belong to thermoplastic coatings. lts base material, polyvinylidene fluoride (PVDF), is a crystalline polymer that does not contain active functional groups. It needs to be melted into a film at high temperatures (250-300℃), and thermoplastic acrylic resin needs to be added during processing to improve pigment dispersibility and adhesion.
COATING PERFORMANCE TESTING INDICATORS
| ITEM | SPECIFIC OF INSPECTION | REMARK |
Film Appearance | smooth, no bubbles, no crater on surface | by visual |
| Fineness | glossy: ≤10μm; matt: 17~20μm | fineness gauge |
| Viscosity | 110-130"/25°C (or room temperature) | FD4#viscometer |
| Wet Film Density | Solvent: 0.8-1.9; white: 1.3; back coating: 1.8 | 100ml weight cup |
| Solid Content | white: 60±5%; silver: 50±3%; other: 53±3% | 105°C×3Hr |
| Gloss | glossy: less than 60° | 60°gloss meter |
| Adhesion | 1mm×1mm×100/100 | cross-hatch test |
| Hardness | HB-H | Mitsubishi pen |
| Impact | 1/2×1000g×50cm, no crack (50 joule/25 joule) | impact tester |
| T-bend | 1T-2T | T-bending machine |
| Solvent Resistance | ≥100 (kilogram force) | MEK |
| Acid And Alkali Resistance | 48hours, no color change, no bubbles, no peels (concentrated nitric acid, 48hrs; HCL5%, 24hrs; NaOH 5%, 24hrs) | 5%HCL 5%NAOH |
| Boiling Resistance | 99±1°C 2hour, no bubbles, no peels | thermostatic water bath |
| Salt Spray Resistance | 35°C 5%NACL×4000Hr no bubbles, no peels | salt fog test cabinet |
| Weather Resistance | 4000Hr no bubbles, no peels, no cracks (UV b) | QUV tester |
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· Substrate:Pre-treated Substrate
· Thinner:Matching Thinner
· Coating viscosity60-90"/25°C
· Film thickness:28±2μm
· Drying condition(PMT):232°C-250°C
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2.THREE-COAT AND THREE-STOVE
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