Process for curing powder coatings

Details Process for curing powder coatings Process for curing powder coatings

B - Operations, Transporting

05

D

B05D 3/06 (2006.01) B05D 1/12 (2006.01) B05D 3/02 (2006.01)

Patent

CA 2496583

The invention provides a process for curing powder coatings which makes it possible to fuse and cure powder coatings using NIR radiation and which gives rise to coatings having improved mechanical properties, improved flow and increased uniformity of surface gloss of the coating.The process for curing powder coatings is charactirized by fusing and curing the powder coatings with NIR radiation, which radiation spectrum is restricted by controlled filtration of the NIR radiation to a wavelength range of 250 to 3000 nanometers, preferably of 750 to 1800 nanometres, with the primary focus of the radiation being in the short wavelength range from 750 to 1200 nanometres.

L'invention concerne un procédé de traitement de revêtements en poudre, qui permet de faire fondre et de traiter les revêtements en poudre au moyen d'un rayonnement proche infrarouge (NIR), et donne des revêtements présentant des propriétés mécaniques améliorées, une plus grande fluidité, et un brillant de surface plus uniforme. Ce procédé de traitement de revêtements en poudre est caractérisé par un processus de fusion et de traitement des revêtements en poudre au moyen d'un rayonnement NIR dont le spectre de rayonnement est limité par une filtration sélective du rayonnement NIR à une gamme de longueurs d'onde comprise entre 250 et 3000 nanomètre, de préférence entre 750 et 1800 nanomètres, le rayonnement se concentrant principalement dans la gamme des ondes courtes comprises entre 750 et 1200 nanomètres.

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