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【Polyurethane Construction Proposal】Indoor Equipment Measures for Food Manufacturing Facilities

Proposal for the installation of polyurethanes to prevent deterioration caused by salt and corrosive gases!

"Polyual" is a corrosion prevention coating for aluminum fins patented by Blygold. It is known that in work environments such as pickle manufacturing, seafood processing, cyanide fumigation warehouses, fermentation equipment for beer, sauce production, mushroom cultivation, photo development equipment, and hair salon permanents, the deterioration of indoor units is severe. Regular and careful maintenance of air conditioning indoor units primarily involves cleaning, and no preventive measures against salt or corrosive gases are taken. In such work environments, the generation of gases that corrode aluminum often leads to the resignation of users to replace fins every three years, with many opting for expensive stainless steel or copper fins. By applying our product, a coating film is formed on the surface of the aluminum fins, helping to prevent deterioration. [Features] - Suppresses the growth of bacteria and mold on heat exchanger aluminum fins - Addresses heat exchangers that cannot be protected even with cationic coatings - Protects outdoor units in salt-damaged areas where salt damage occurs even with heavy salt damage specifications - Repairs through touch-up, providing semi-permanent protection for fins - Maintains high thermal conductivity, allowing for thick coating films and heat exchange performance, among others *For more details, please refer to the PDF document or feel free to contact us.

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Q&A page regarding the aluminum fin deterioration prevention paint "Polyual".

Introducing answers to questions regarding the application of aluminum fin deterioration prevention paint!

"Polyual" is a corrosion prevention coating for aluminum fins patented by Blygold. By applying this product, a coating film is formed on the surface of the aluminum fins, helping to prevent deterioration. We have answered questions regarding this product, and here are some examples. 【Q&A Examples (Excerpt)】 ■ Can it be applied to household or small air conditioners? ■ Where can I buy Polyual? ■ Can it be applied to new units as well? ■ Will it increase electricity consumption? ■ Can the air conditioner be used during application? And more. *For more details, please refer to the external link or feel free to contact us.

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Comparison with stainless steel fins and copper fins

Comparing "stainless steel fins," "copper fins," and "polyural"! A detailed explanation will follow.

Stainless steel fins deteriorate under severe salt damage conditions, and their low thermal conductivity is well known. Copper fins excel in thermal conductivity due to their close contact with copper tubes, but they are expensive, and the salt resistance of copper is not significantly different from that of aluminum, resulting in a deterioration rate that is said to be about half that of standard aluminum fins (deterioration between dissimilar metals can be avoided). Under conditions where standard aluminum fins deteriorate in three years, copper fins would deteriorate in about five to six years. Therefore, we propose our aluminum fin deterioration prevention coating, "Polyual." 【Features of Polyual】 ■ Provides semi-permanent protection ■ Maintains and restores the initial performance of fins ■ Effectively protects the air conditioning unit's function from salt damage and polluted gases ■ Thoroughly envelops and protects the fins from the inside to the ends ■ Shuts out the intrusion of salt damage and pollution *For more details, please refer to the PDF document or feel free to contact us.

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Can it be overcoated with cation?

A detailed explanation of whether topcoating can be done on cationic electrodeposition coating!

We often receive inquiries about whether it is possible to apply a topcoat over cationic electrodeposition paint. The answer is yes, it is possible and there are proven results. However, when a topcoat is applied over cationic paint, the adhesion is dominated by the cationic layer. If the brittle cationic coating cracks or peels, the topcoat may also tear, and in such cases, it will not be covered by warranty. Using a thin pre-coat film with salt damage resistance reduces the risk, but the adhesion will still be weaker compared to direct painting on aluminum or copper. Considering the costs, we recommend painting directly on aluminum or copper. *For more details, please refer to the PDF materials or feel free to contact us.*

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Comparison with cationic electrodeposition

Comparing "cationic electrophoretic painting" and "polyurethane"! Detailed explanation to follow.

Cationic electrodeposition is an excellent rust prevention technology; however, in the case of heat exchangers, a film thickness of 20 microns, which is expected to provide sufficient rust prevention effect, can affect thermal efficiency, leading to an increase in electrical material quantity and potentially requiring larger equipment. Therefore, we propose our aluminum fin deterioration prevention coating "Polyual." 【Comparison】 <Cationic Electrodeposition / Polyual> ■ Application: At manufacturing / At manufacturing and installation site - Since thinner is used for Polyual application, if installed indoors, it will need to be painted outdoors before installation. ■ Film thickness: 8–30 microns / 20–25 microns ■ Thermal conductivity: Low / High - Polyual has thermal conductivity equivalent to aluminum. ■ Repairability: Not possible / Possible *For more details, please refer to the PDF document or feel free to contact us.

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Comparison with precoat

Comparing "Precoat" and "Polyural"! Detailed explanation to follow.

Salt-resistant and heavy salt-resistant outdoor units use aluminum fins coated with a polymer known as pre-coat, which protects the aluminum from salt damage and other hazards. However, while the thickness of the Polyual membrane is 20 to 25 micrometers, the pre-coat is only about 2 to 3 micrometers thick. After 3 to 5 years of exposure to salt damage, rust can occur, and the pre-coat membrane may disappear due to ultraviolet rays. Additionally, since the pre-coat involves processing aluminum sheets coated with polymer, the cut surfaces, internal cutouts, and contact points with copper pipes are exposed to the outside air, becoming entry points for salt damage and corrosion. The aluminum fin deterioration prevention coating "Polyual" addresses these issues. [Overview] The Polyual coating membrane is applied after the heat exchanger assembly, ensuring thorough protection of both the contact points with the copper pipes at the fin tips and the internal cutout areas. In salt-resistant pre-coats, these areas are exposed to outside air. *For more details, please refer to the PDF document or feel free to contact us.

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