Coating

Recovery of pigments and inks resulting from painting processes such as purification of cataphoretic or anophoretic paints in the automotive industry are essential to reduce costs and waste water.

Electrodeposition painting systems (ED), them being CATAPHORETIC or ANAPHORETIC, for decades have been a part of the coating process of metallic parts in the automobile industry, household appliance, metallic wardrobes and other products with electrically conductive surfaces.

SEPRA is able to offer different solutions for coating systems, such as E-Coating.

• Pigments/inks recovery from ED-PAINT; the coating process of metallic parts through electrodeposition (ED), widely common in the car industry, leads to numerous losses of pigment brought by the parts to the successive phases of processing. Ultrafiltration membranes are a very good recovery system considering that they recover 96-98% of the pigments/inks that would have been lost otherwise.
• Water recovery from ED-PAINT; after having recovered the pigments, a second stage composed by a reverse osmosis membrane and other parts, is able to recover deionized water to be used in the rinse baths. Adding this stage to the plant the need for demineralized water for the rinse of any component will be reduced and in some cases eliminated and consequently the usage of new water will be lowered and the productive cycle will be closed.
• Ink concentration Flexographic/Serigraphy; it's possible to reconcentrate different kinds of paint using tubular ceramic ultrafiltration membranes. As for water based paint, this process enables you to save on disposal and to reuse paint, otherwise wasted.
• Degreasing solutions' maintenance; membrane separation technology allows you to raise the efficiency of the degreasing processes which are meant to prepare the parts prior to painting. In fact these membranes  maintain an unaltered efficiency of the solutions over time.

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