its the homopolymer of vinylidene fluoride .The fluorocarbon chemical bond is acknowledged as the most stable and firm bond. mainly for the external decorative coating ,billboards and highwayof the high building package: plastic drum and hard circular barrels on the top weight:10 or 25 kg/drum appearance white powder standard relative density 1.75-1.77g/cm3 melting point: 156-165 PVDF Coating Features Weathering-Resistance: Resisting tough climate and ozone attack. UV-Resistance: Resisting UV degradation and pulverization; lasting retention of original color and luster. Chemical Resistance: Resisting corrosion from acid and alkali; free from contamination by air and acid rain. Corrosion-Resistance: Low penetration by dampness or corrosion; lasting performance in harsh environment. Mechanical Performance: Impact and corrosion resistant; excellent coat flexibility. Pollution-Resistance: Good damp-resistance enabling the profile to be non-nutrient for mold and bacteria. Low Maintenance: No accumulation of dust and dirt greatly reducing cleaning work and building costs