Stock material or miscellaneous articles – Structurally defined web or sheet – Edge feature
Patent
1995-06-05
1997-04-29
Ryan, Patrick
Stock material or miscellaneous articles
Structurally defined web or sheet
Edge feature
428193, 4283066, 4283179, 4283193, 428 81, 427284, B32B 302
Patent
active
056247354
ABSTRACT:
Sheet molded compound articles which optionally can be in-mold coated have the edges and exterior margin surfaces thereof sealed with a water-free and solventless fine particle size powder coating. The coating thickness has a gradual and smooth transition from the sealed edge to the non powder coated exterior surface thereby eliminating the need for sanding. The desired method of application is by electrostatic spraying and the cured powder coating is free of pops. Application of the powder coating to the edge and margin portions of the sheet molded compound article includes heating at least the edges of the article near or above the cure temperature of a subsequently applied powder coating to degas the article, reducing the temperature of at least the edge and margin portions of the article to a temperature below the powder coating cure temperature, applying a fine size powder coating material to the edge and margin portion of the article and heating the applied powder coating to a temperature at or above the minimum cure temperature thereof.
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Encyclopedia of Polymer Science and Engineering, vol. 3, John Wiley & Sons, pp. 632-633.
Anderson Adam M.
Castillo Joseph V.
DePalma Pasquale V.
Thompson Daniel A.
Cambridge Industries, Inc.
Ryan Patrick
Yamnitzky Marie R.
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