ASTM A755 0.85mm Brick grain Pre-finished PPGL Prepainted Galvalume
color-coated Steel HDP Beckers for cladding
PPGI & PPGL (pre-painted galvanised steel sheet &
pre-painted galvalume steel sheet), also known as pre-coated steel
sheet or colour-coated steel sheet, consists of hot-dip galvanised
steel sheet, hot-dip galvanised galvalume steel sheet and electro
galvanised steel sheet.
After pre-treatment of the surface, one or more layers of organic
coating are applied and baked solidified. Colour-coated steel
sheets are lightweight, good in appearance, corrosion resistant and
can be directly processed.
Colours are generally divided into grey, sea blue, brick red, etc.
They are mainly used in advertising, construction, decoration,
household appliances, electronics, furniture industry and
transport.
The coatings used for coloured coils depend on the environment in
which the resin is selected, such as silicone-modified polyester,
polyvinyl chloride plastisol or polyvinylidene chloride.
Types of Coatings for PPGI and PPGL
Polyester (PE): good adhesion, colourful, wide range of formability
and outdoor durability, medium chemical resistance, low cost.
Silicone Modified Polyester (SMP): Good abrasion and heat
resistance, as well as good exterior durability and resistance to
chalking, gloss retention, general flexibility, medium cost.
Highly durable polyester (HDP): excellent colour retention and UV
resistance, outstanding outdoor durability and anti-chalking
properties, good film adhesion, colourful, cost-effective.
Polyvinylidene fluoride (PVDF): excellent colour retention and UV
resistance, excellent outdoor durability and anti-chalking
properties, excellent solvent resistance, good formability, stain
resistance, limited colours, high cost.
Polyurethane (PU): Polyurethane coatings are characterised by high
abrasion resistance, high corrosion resistance and high vandalism
resistance. Under normal conditions, the shelf life can be more
than 20 years. It is mainly used in buildings with severe
environmental corrosion.
Main features
- Better durability and longer service life compared with galvanised
steel.
- High heat resistance, less discolouration at high temperatures
compared to galvanised steel.
- Highly heat-reflective
- Processability and painting properties similar to galvanised steel.
- excellent welding properties
- Cost-effective, long-lasting performance at a very competitive
price.
Coating structure details: