Prepainted metal is all around us. You are probably familiar
with its many uses in the building and construction and appliance markets, but
you may not be aware that prepainted metal is also important in the
Think “transportation,” and your mind typically leaps to cars and trucks—and from there to the beautiful body panels that are an aesthetically important part of these vehicles. Spoiler alert: Painted automotive body panels require specialized coatings and application techniques and, as a result, are not ideally suited to the use of prepainted metal. Nonetheless, there are plenty examples of coil-processed material used in the transportation sector.
Urban legends are, well, false—but still fun, because there is always something believable about them. Is it true that you are never more than six feet away from a spider? Who really knows, and some might say who really cares? But let’s face it—don’t you find yourself wondering, “Hmmm, I wonder if it’s true, and should I be calling an exterminator?” Well, here’s something that is not a legend: You would be surprised to learn how many articles in your home, just feet away from you, are made from prepainted metal.
We’ll confine our discussion here to obvious weather
differences, but we won’t get into how
coil coatings formulators accommodate those differences. That’s a discussion for
another day. Just know that steel and aluminum companies, pretreatment
suppliers, and coatings chemists are working hard to formulate a coil coating
system that provides the necessary performance for a particular region.
Sustainability, upcycling, downcycling, landfills … the list
goes on! What is one to think when every material is touted as sustainable?
Don’t believe me? Visit any material website; for example, cement/concrete,
vinyl plastic, wood building products. What is one to make of all these claims—are
they real? How does our industry fit in?
We begin with two strange words, which in some ways are opposites—and in other ways are similar.
Welcome to the fascinating world of wetting.
First, let’s keep this simple. Let’s only think about water—as opposed to oily materials—that is deposited onto coatings, windows, mirrors, the leaves of plants, etc. The water (in the form of rain, steam, fog, etc.) may form droplets on the surface, or it may spread into a thin film. A hydrophobic substrate causes the water to form droplets; a hydrophilic coating, however, causes the water to spread into a thin film. But how do you keep these two terms straight, given that they sound so similar? Continue reading →
I know you had a 30-year warranty, but—after 15 years—those shingles simply must be replaced. Anyone can call a roofer, but why not take a shot at making your own shingles? But first you need a formulation—the recipe—and I’ve got just the one for you. And while we’re at it, let’s compare shingle manufacturing to metal roofing manufacturing.
Prescriptive Requirements vs. Performance-Based Testing in the Construction Market
Sometimes your doctor writes a prescription for your ailment, and sometimes your doctor wants to run some tests first. The first example is a prescriptive approach (do this and you will be okay), whereas the second example is a performance-based approach to solving your problem (take some meaningful measurements and then determine what to do). The same two options are also used in the metal building industry.
Announcer: There is nothing wrong with your television set. Do not attempt to adjust the picture. We are controlling transmission. We will control the horizontal. We will control the vertical. We can change the focus to a soft blur or sharpen it to crystal clarity. For the next hour, sit quietly, and we will control all that you see and hear. We repeat: there is nothing wrong with your television set. You are about to participate in a great adventure. Continue reading →
About 75% of the North American coil coating industry is dedicated to building products. Since the lifetime of these products is measured in decades, as opposed to merely years, the weathering performance of the coatings used for this market is critical. Understanding how coatings perform, therefore, is essential. There are many approaches to studying weathering performance, and one of the more interesting techniques to accelerate the weathering process involves the devices described in these two ASTM standards:
As an association, the National Coil Coating Association (NCCA) has the ability to speak with one voice on any number of issues. The association is dedicated to the coil coating process: cleaning a metal substrate (aluminum, hot-dipped galvanized steel, etc.), chemically treating the substrate to enhance corrosion resistance and paint adhesion, priming the strip with a corrosion-resistant primer, and topcoating the strip with any number of materials designed to provide aesthetics and durability to the coil-coated metals used in the construction products, transportation, appliance, and HVAC markets. Continue reading →