Stock material or miscellaneous articles – Structurally defined web or sheet – Weight per unit area specified
Patent
1997-01-24
1999-06-01
Raimund, Christopher
Stock material or miscellaneous articles
Structurally defined web or sheet
Weight per unit area specified
442331, 442388, 442391, 442402, 28107, 4273897, 4273899, 264258, B32B 702
Patent
active
059086890
ABSTRACT:
The present invention provides a mat adapted to reinforce a thermosetting matrix material to form a composite, composites formed therefrom, and methods related thereto. The mat includes a primary, supporting layer having a plurality of randomly oriented essentially continuous glass fiber strands. The primary layer has about 1 to about 10 weight percent of the mat on a total solids basis. The mat also includes a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer including a plurality of glass fiber strands. The mean average length of the glass fiber strands of the secondary layer ranges from about 20 to about 125 millimeters. The strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together.
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Dana David E.
Martine Edward A.
Morris Steven J.
Unites Thomas P.
Cannoni Ann Marie
PPG Industries Inc.
Raimund Christopher
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