Prepainted Steel Sheets: Category and Characteristics of Finish Coats
2023年1月22日
Prepainted Steel Sheets: Category and Characteristics of Finish Coats
Category of finish coats
Among all the ingredients of coil coatings, resin and pigmenthave the function of duration, and the primers commonlyused consist of polyester, silicon modifed polyester, polyvinylidene fluoride, high durability polyurethane, etc.
(1) Polyester
The finish coat of this kind has strong adhesive force, a va-riety of colors, wide scope of properties in formation anddurability outdoors, moderate chemical resistance andlow cost.
(2) Silicon modifed polyesters
The membrane of the finish coat of this kind has excellentrigidity, abrasion resistance, thermal resistance, good out-side durability, chalking resistance, high retention of colorand luster, ordinary flexibility, moderate cost, etc.
(3) High-durability polyester
The finish coat ofthis kind has excellent retention of colorresistance of ultra-violet radiation, strong outdoors du-rability, chalking resistance, strong adhesion to the basemetal, plenty of colors and relatively lower cost comparedto the same quality.
(4) Polyvinylidene fluoride
The finish coat of this kind features in its excellent reten-tion of color, resistance of ultra-violet radiation, outdoorsdurability, chalking resistance, resistance to solvent, form-ability, good dirt resistance, finite colors and high cost.
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