Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Reexamination Certificate
2008-03-04
2010-10-19
Ahmed, Sheeba (Department: 1787)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
C428S220000, C428S332000
Reexamination Certificate
active
07816000
ABSTRACT:
A plastic sheet product having a matte finish comprises a core layer of a thermoplastic polymer and at least one layer of a capstock composition which overlies, and is bonded to, at least one face of the core layer. The capstock composition comprises the same or different thermoplastic polymer and contains a plurality of discrete particles immiscible with and dispersed in the thermoplastic polymer of the capstock composition. The sheet product may be prepared by the co-extrusion of the thermoplastic polymer and the capstock composition, and in a particular embodiment, such co-extrusion may be conducted by means of a feedblock. In a particular embodiment, the thermoplastic polymer of the core layer and that of the capstock composition may be the same, such as in the instance of a methylmethacrylate-methylacrylate copolymer. Sheet products prepared in accordance with the invention exhibit improved post-processability and ease of surface maintenance, and may be fabricated into a variety of products including light diffusers, projection screens, and the like.
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LaFontaine Grant B.
Litke Jennifer A.
Smith Robert E.
Sparks Darrell L.
Ahmed Sheeba
Evonik Cyro LLC
Klauber & Jackson LLC
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