Tuesday 24 April 2018

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Waterborne coatings: why are they seldom used even if the final consumer and law are against solvents?



Gianni Giardina interview: a plant that has grown an experience of more than 45 years in wood coating industry up.

PM- In the last ten-year period you could chase the initiation of thousands of plants that used water-based coatings.  Which would the main purpouses that facilitated that installations? Today can these motivations be valid for proposing again the use of these paints?
GG- In the next century, the heavy expansion and industrialization in wooden industry, guided to an overstated purpose of solvent-based coatings, damages to the environment and people that worked in factories.  Even the final purchasers of coated manufacts were subjected to indirect consequences. For many years thay have breathed the solvents’ vapors that came from the surfaces of the furniture bought many time before.  For different reasons, everyone wanted to eliminate solvents, and yet the change started just with the beginning of the new year.

PM- What has the change prevented?
GG: The three main characters of this sector, coatings plants and coaters, should have cooperated. At the end of the last century, the waterborne paints were unsaleable because:
1) They costed much more than the solvent ones. The lacking used quantity didn’t allow an economy of scale in research and production;
2) The technicians couldn’t guarantee a repetitive drying. For example it was very difficult to apply the spray paints, to have regularity in each part of the coated batch and, as a consequence, to provide the right quantity with the wet features necessary to paint strip water in film coating. The accidental variation of one of these parametres meant that it couldn’t be possibile to pile the batches at the end of the coating line. So painters weren’t willing to have an uncertain result and to spend more in production costs.

PM – Starting from the 19th century something has changed the scenery so much that thounsands of users successfully installed water plants in the first 5-6 years. What’s happened?  
GG: During the 1999, a young Friulian engeneer who worked in a regional research center, accidentally changing some wavelenghts, identified some anomalies on the samples.  Through common knowledges he put them through me. This made me build a prototype and, thanks to others consolidated technologies, I could develop a deliver coating water system, without heating the batch and using the air of the environment for the exsiccation.  
With the new technology we called different clients interested in water-based coatings and so we successfully sold and installed the first microwave technology plants.

PM – So were coatings already ready?
GG: Not yet, but by removinq the exsiccation air, the users started working and producing with water-based paints. In the mean time, in the six months between the acceptance of the client, the installation and the final delivery, the technicians could create coatings with the quality requested by the consumer.   Counting on sure consumption and a huge potential market, the coatings producers throw themselves in the research, succeeding in reducing prices and giving to the water-based coatings the same features of the solvent-based ones. 

PM- What did you do to fight the scepticism around water-based products?
GG- We work a lot with marketing. For each new functional plant, we realized an interview to the client, photos and videos. All the multimedial material was sent by email to hundreds of potential clients and posted on the website. So anyone could call into question the words of a client that was satisfied by its painted production with water-based coatings while it was piled at the exit of the oven. This had the effect to put an increasingly attention to the waterborne paints and the new plants.
In the mean time others technologies such as IR and vertical ovens could have been successfully proposed by other technicians. In just a few years hundreds of plants have been realized for furniture, kitchens, doors and windows, contours, chairs, coffers and so on. 

PM- What’s happened then? Why did statistics tell us that the water-based products consumption is decreasing?
GG:- First let’s specify that the purpose of water-based paints on wooden doors and windows could never change. The furniture is a different story.
Thanks to the general crisis developed all over the world, the furniture sector have seen both the crisis of the water- based products and of all the application systems projected for big ranges of batches. The companies, in order to sale and please their clients, accepted also little orders using plants projected for large volumes of batches. Anyone was ready to work waterborne little batches, so they hand painted in booths or relied on third party that worked in booth too.
Working in coathing booths without the right equipment meant to entrust to the weather conditions for the exsiccation and this is really dangerous. We must add that, when you apply the coating above both the surfaces and sides of a patch, it’s important to do it with the same paint in favour of the final quality.
There’s a waiting time in vaporizing all of the sides of the patches. It could be a long wait if you use water-based products without the right plant, so the pot life will surely be already expired and so you must throw away the coating and make a new one. The new paint could not have the same shades of the first one.  In conclusion: the coater choose much more safe and rapid solvent-based paints, fast drying on a carriage, even without adequate plant.

PM- So how do you get out of it? Do we have to wait for the end of the crisis to not pollute by using industrial plants?
GG:- Not necessary, exsiccation water-based paints safe systems exist for single carriages. These systems exsiccate little batches in few time to turn patches by using the same coating above all the sides.  I built about ten for clients that already worked with little batches. In Italy there are about three technicians that produce them.  They are small low cost plants. 

PM- Ikea is an example of how we can create a market on sustainability and convince the consumer that we can and must produce respecting the environment with suitable materials, including paints. This philosophy has become their commercial strength. The "People & Planet" program foresees that by 2020 it will be 100% eco-sustainable. The tendency of the legislator seems to want to limit more and more all the products considered dangerous for human health, such as formaldehyde, heavy metals, solvents, and CO2 emissions. How can painters follow this "Ikea trend" and respect the laws?
GG- Ikea philosophy is irreversible, scaled-world. You can try to fight just on some segments of the market, even if today the alternatives could always be found.  Some years ago Ikea was known as a producer of economic and unreliable furniture. Time after time it invested in quality and marketing. It made the world understand that the beauty and the bad are individual, because they have to satisfy the likings of all the world but quality, price and reliability are general such as the environment respect.
The furniture maker that wants to follow Ikea or similar companies, naturally for a different clients range, can do it by investing in design without giving quality, reliability and environment respect up. He would be defeated before to start fighting. 

PM- In summary, what should we do?
GG- With the crisis the furniture makers had rightly to adjust their general costs to the sales volume. Now they have to adapt the plants to the new productive needs. We talk about flexible plants, that accepted one batch, automated and that use unpolluted paints. The tecnichians could be the main characters in this adaptation. Then everything must be given to marketing and communication.  
Only with these purposes they could enter the increasingly aggressive market. 

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