Four Coating Types of PPGI Coil: Which One do You Like Best?

PPGI coil is also called prepainted galvanized steel coil, color coated steel coil, or factory pre-painted zinc-coated steel. It enjoys wide popularity due to its strength and beauty. Generally, it is a product combined with a hot-dip zinc-coated steel substrate with organic coatings. For one thing, the hot-dip metallic coating process of zinc provides good coating adhesion and weldability; For another, the organic coating on the surface acts as protective insulation from rust, which extends its service life. So what are these organic paints? Let’s have a look.

1. Polyester (PE)

Polyester is a category of polymers that contain the ester functional group in every repeat unit of their main chains. As a thermoplastic elastomer, it is widely used in various industries since it was discovered. It owes good adhesion and is not strict in formability and outdoor durability. At the same time, some certain degree of chemical resistance can be seen. So it is commonly employed in PPGI products at a low cost.

2. Silicon Modified Polyester (SMP)

Silicone Modified Polyester is a silicon resin-modified Polyester paint coated and heat dried. It guarantees good hardness, wear resistance, heat resistance, chalking resistance, as well as good external durability. But its luster retention and flexibility are not very high. And it costs a little higher than PE. In general, SMP products are coated and baked with paint containing silicon resin, which is suitable for coastal areas. So this kind of PPGI coil can be more applied to seaside environments.

3. High Durable Polyester (HDP)

It is a weatherproof resin developed with hydrogenated monomer & neo structure monomer. Similar durability to PVDF, but it offers a more competitive price and advantages of various colors & gloss. In a word, it is much better than PE but a little lower than PVDF. What’s more, it inherits SMP’s good points and adds some new benefits like UV resistance and higher adhesive force. It can be obtained in a cost-effective way. And more color options make it appreciated by more and more people.

4. Polyvinylidene Fluoride (PVDF)

This coating, made by fluorine carbon resin, pigment, and ester solvent, is solidified to dry film with super weather resistance after high-temperature roasting and baking. It assures high weatherproofing against acids and heat and has high durability and match-in ability. Also, the hydrophilic surface treatment will enable dust to be removed easily and always keep clean. PVDF is especially opposed to solvents, abrasion, UV, chalk, and has a low density compared to similar fluoropolymers. It is much superior to the other three coatings, accompanied by the high cost.

In a word, above are four main common coatings used in PPGI coils. Believe you have grasped a detailed understanding of it. Hope you can choose the one you like when buying. In addition to the coating pattern we introduced today, it also has other patterns like embossing and printing, which gives you a variety of aesthetic needs. If you want to know more, pls consult Wanzhi Steel for further understanding. Welcome to visit their website: https://wzppgi.com.