Processes for drying topcoats and multicomponent composite...

B - Operations – Transporting – 05 – D

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B05D 1/38 (2006.01) B05D 3/02 (2006.01) B05D 3/06 (2006.01) B05D 7/14 (2006.01) F26B 3/28 (2006.01) B05D 3/04 (2006.01)

Patent

CA 2374138

The present invention provides processes for drying and/or curing topcoatings and multicomponent composite coatings applied to surfaces of metal or polymeric substrates which include applying infrared radiation and warm, low velocity air simultaneously to the coating for a period of at least about 30 seconds and increasing the substrate temperature at a predetermined rate to achieve a specified peak temperature. Infrared radiation and hot air are applied simultaneously to the coating for a period of at least about 3 minutes and the substrate temperature is increased at a predetermined rate to achieve a specified peak temperature, such that a dried and/or cured coating is formed upon the surface of the substrate.

L'invention concerne des procédés pour sécher et/ou traiter des couches de finition et des couches composites à composants multiples appliquées sur les surfaces de substrats métalliques ou polymères. Lesdits procédés consistent à appliquer simultanément un rayonnement infrarouge et de l'air chaud à faible vitesse sur la couche pendant au moins environ 30 secondes et à augmenter la température du substrat à une vitesse prédéterminée, de sorte qu'une température de pointe spécifiée soit atteinte. Un rayonnement infrarouge et de l'air chaud sont appliqués simultanément sur le revêtement pendant au moins 3 minutes et la température du substrat est augmentée à une vitesse prédéterminée, de sorte qu'une température de pointe spécifiée soit atteinte, un revêtement séché et/ou traité étant ainsi formé sur la surface du substrat.

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