Apparatus and related method for rapid cure of sol-gel coatings

Details Apparatus and related method for rapid cure of sol-gel coatings Apparatus and related method for rapid cure of sol-gel coatings

2005-03-29

2005-03-29

Esquivel, Denise L. (Department: 3749)

Drying and gas or vapor contact with solids

Material treated by electromagnetic energy

Infrared energy

C034S274000, C034S420000

Reexamination Certificate

active

06871418

ABSTRACT:
This invention resides in an apparatus and related method for rapidly curing thin film sol-gel coatings, particularly such coatings adhered to low melting temperature plastic substrates, whether rigid or flexible, without deforming the substrate. The curing is achieved using IR heating lamps and dry or humid hot gas flow. This curing densities the sol-gel coating and provides desired optical and mechanical properties. The use of IR lamps and hot-gas nozzles, either singularly or in combination, produces a rapid cure by effectively heating the thin film coating layer. In this manner, a sufficiently high temperature can be attained in the film layer, to densify the sol-gel coating, but for a sufficiently short time duration to avoid melting or otherwise deforming the substrate. The sol-gel coatings can be cured two to three orders of magnitude faster than with conventional oven curing, leading to significant cost reductions and manufacturing efficiency.

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