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AssigneeNone recorded
InventorsLeighton M. Cooper, Charles H. Smuck, Daniel L. Serafin, Robert E. Bombalski
Estimating the term…
A lighting sheet including an aluminum sheet with a substantially uniform, non-directional roll textured surface having an extended surface area (Ra roughness of about 15 to about 35 microinches) and a clear polymer layer not containing added particulate matter coated on the textured surface. The non-directional roll textured surface provides a uniform matte finish to the lighting sheet.
A lighting sheet comprising:
A process for making an aluminum sheet product having a reflective surface, comprising:
The process of claim 111, wherein the aluminum sheet comprises an aluminum alloy selected from the group consisting of the AA 1000, 3000, and 5000 series.
Dependencies are inferred from the claim text.
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Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying…
For surface treatment: texturing
Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate…: by…
To obtain multicolour or other optical effects: metallic effect
Term end not estimated
1. Field of the Invention
The present invention is directed to an aluminum alloy sheet product for lighting sheet with a diffuse appearance and a highly reflective surface, more particularly, to a lighting sheet produced from roll textured aluminum sheet product.
2. Prior Art
The present invention includes a lighting sheet and a method of making the same. In its most basic form, the lighting sheet of the present invention includes a roll textured, aluminum alloy sheet having a reflective surface with substantially non-directional roughness that is protected by a conversion coating and a polymer coating.
Aluminum sheet material of the invention is preferably made from an aluminum alloy. As used herein, the term “aluminum alloy” refers to an alloy containing about 90% or more aluminum, and one or more alloying elements. when alloying is necessary for mechanical performance, the preferred alloying elements are magnesium, usually comprising about 0.5 to about 10 wt. % of the alloy, and manganese, usually provided at about 0.15 to about 2 wt. % of the total alloy. Various aluminum alloys in sheet form are suitable for the practice of the present invention, including the alloys of the 1000, 3000, 5000 series (Aluminum Association designations). Appropriate tempers include H1x, H2x, H3x, and O-tempers (Aluminum Association designations). Aluminum-magnesium alloys of the AA 5000 series are preferred, especially the AA 5000 series alloys containing about 15 wt. % or less magnesium.
Some suitable compositions include the 1050, 1100, 1085, 3003, 3004, 3005, 5005, 5050, 5052, 5252, and 5657 aluminum alloys (Aluminum Association series). The AA 5005 alloy contains about 0.5-1.1 wt. % Mg, 0.07-0.30 wt. % Si, 0.10-0.7 wt. % Fe, 0.03-0.20 wt. % Cu, 0.20 wt. % max. Mn, 0.10 wt. % max. Cr, 0.25 wt. % max. Zn, 0.15 wt. % max. other alloying elements and impurities, and remainder Al. The alloy may contain about 0.65-0.80 wt. % Mg, 0.07-0.09 wt. % Si, 0.10-0.17 wt. % Fe, 0.03-0.06 wt. % Cu, 0.010 wt. % max. Mn, 0.05 wt. % max. Cr, 0.10 wt. % max. Zn, 0.10 wt. % max. other alloying elements and impurities, and remainder Al. The sheet may be about 0.01 to about 0.03 inch thick.