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Pre Painted Steel Sheet

  • COSASTEEL is a Chinese pre-painted steel sheet manufacturer, that currently has two pre-painted steel sheet production lines, each with a capacity of 150,000 tons.
  • The thickness is 0.2-0.8mm, the width is 600-1350mm, and the substrate has two types: hot-dip galvanizing and hot-dip galvanizing. Coatings include polyester (PE), silicon modified polyester (SMP), high durability polyester (HDP), fluorocarbon (PVDF), etc.
  • There are various steel grades, including the general structure and forming and high-strength structure.
Products NamePolyester Pre-Painted Galvanized Steel SheetPolyester Pre-Painted Galvalume Steel SheetHDP Pre-Painted Steel SheetPVDF Pre-Painted Steel SheetPVDF Pre-Painted Steel Sheet
FeatureRich colors, average weather resistanceRich colors, good corrosion resistanceExcellent corrosion resistance and weather resistance, cost-effective, self-cleaningAverage load bearing capacity, first-class corrosion resistance and weather resistance, self-cleaningLarge load bearing capacity, excellent corrosion resistance and weather resistance, self-cleaning
Usecommon buildingcommon buildingindustrial buildingindustrial building, coastal buildingindustrial building, coastal building, As well as windy, snowy areas, large-span buildings
Top PaintPolyester (PE)Polyester (PE)High Durable Polyester(HDP)PVDFPVDF
Paint thickness≥20μm≥20μm≥23μm≥23μm≥23μm
Substrate MaterialHot Dipped GalvanizedGalvalumeHot Dipped Galvanized/GalvalumeGalvalumeGalvalume
Zinc weight(g)12070180/100150165
Steel GradeDX51D+ZDX51D+AZDX51D+ZDX51D+AZS350GD+AZ
Salt spray resistant≥1000 hours≥1000 hours≥1500 hours≥2000 hours≥2000 hours
Aging resistance≥1000 hours (QUVA-340)≥1000 hours (QUVA-340)≥1500 hours (QUVA-340)≥2500 hours (QUVA-340)≥2500 hours (QUVA-340)
Quality assurance5-10 years5-10 years15 years20 years20 years

The pre-painted steel sheet is based on cold-rolled steel sheet and galvanized steel sheet, after surface pretreatment (degreasing, cleaning, chemical conversion treatment), and coating (roller coating method), a product made by baking and cooling.

The coating structure includes two coats and one bake, two coats and two bakes, etc. The maintenance-free service life can be 10-30 years depending on the ambient atmosphere.

The main production process of the common two-coating and two-baking type continuous color coating unit is uncoiler – stitching machine – pressing roller – tensioning machine – Uncoiling Looper – Alkaline Degreasing – Cleaning – Drying – Passivation – Drying – Beginning Coating – initial coating and drying – topcoat fine coating – topcoat drying – air cooling and cooling – winding work Set – rewinder – (the next roll is packed and put into storage).

Pre Painted Steel Sheet 1

The coating structure of the double-sided two-coated and two-baked color-coated steel plate is shown in the above picture

The upper surface is coated with two layers of paint, and the lower surface is coated with a layer of color-coated steel plate, as shown in the picture above (this kind of back paint is generally not suitable for front use)

Pre-Painted Steel Sheet is a product made of cold-rolled steel sheet, electro-galvanized steel sheet, hot-dip galvanized steel sheet, or galvanized steel sheet after surface degreasing, phosphating, and chromate treatment, and then coated with organic paint and baked. . The commonly used coatings for color-coated steel plates are polyester (PE), followed by silicon-modified polyester (SMP), PVDF, etc. The coating structure is divided into two coatings and one baking and two coatings and two baking. The thickness of the coating is generally 20- 25μ, backside is 8-10μ.

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