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custom design cold steel printed colorized painting steel sheets preprinted galvanized sheet coil1

3 year ago
32 0
Product details
The commonly used coatings for ppgi prepainted galvanized steel coil are polyester (PE), followed by silicon modified resin (SMP), high weather resistant polyester (HDP), polyvinylidene fluoride (PVDF), etc. The coating structure is divided into two coating and one drying and two coating and two drying. The coating thickness is generally 20-25u on the surface and 8-10u on the back. For external use in buildings, it should not be lower than 20u on the surface and 10u on the back. The standards commonly used for color coated coil ppgi are ASTM A527 (galvanized) and ASTM AT92 (aluminum zinc plated) from the United States, JIS G3302 from Japan, EN/0142 from Europe, KS D3506 from Korea, and Q/BQB420 from Baosteel.
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