Reflective aluminum strip

Details Reflective aluminum strip Reflective aluminum strip

1995-10-18

1997-06-10

Silverberg, Sam

Stock material or miscellaneous articles

Composite

Of polyisocyanurate

428421, 148251, 148247, 148257, 1562726, 156325, C23C 2237, C25D 708

Patent

active

056374046

ABSTRACT:
A strip of highly reflective aluminum protected by a conversion coating and a light-permeable fluoropolymer coating which is non-adhesively interstitially mechanically bonded to the microscopic irregularities of the conversion coated surface. The highly reflective strip may be substituted for polished stainless steel and/or bi-metal and used under aggressive conditions for a prolonged period without deleteriously affecting the initial D/I (distinctness of reflected image) of the shaped strip. The strip of arbitrary length may be shaped in rolling dies so that at least a portion of the strip has a radius of less than 10 mm without damaging or separating the fluoropolymer coating. The specific steps of the claimed process require starting with a bright-rolled clean strip which is conversion coated to carry a thin metal compound coating. The reflective conversion coated surface is coated with the fluoropolymer while maintaining at least 80% D/I. The strip can then be formed to a desired profile and may optionally be treated with a corona discharge to so as to facilitate non-adhesively bonding of a thermoplastic strip to the activated fluoropolymer surface.

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Stoneberg, Richard L., "Fluropolymer Finishes for Architectural Aluminum", PPG Industries, Inc., Proceedings of Fifth International Aluminum Extrusion Technology Seminar, pp. 613-618.
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