Sheet molding compound having improved characteristics
AssigneesOwens Corning Fiberglas Technology, Inc., Owens Corning Composites SPRL
InventorsJacques H. Gerard, David E. Adam, deceased, Frank R. Cichocki, Michael H. Jander, Paul R. Krumlauf, Giovanni Montagna, Donald B. Sage
Life of this patent
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Abstract
A composite part made from a sheet molding compound is disclosed as having improved characteristics over traditional sheet molding compound composite parts. The fibrous material is introduced as a veil layer adjacent a paste layer, the veil flows well during the molding process. The improved flow and surface characteristics of a composite part are attributed to the elongation of the veil during molding and to the improved filling capabilities.
Claims11
A sheet molding composite sheet for use in structural reinforced compression molded composite parts, the sheet comprising in an uncompacted form between a pair of outer film layers:
- a first layer of resin paste applied to one of the pair of outer film layers;
- a second layer of resin paste applied to the other of the pair of outer film layers;
- n layers of nonwoven discrete filaments or reinforcement fibers, wherein the filaments or fibers do not melt when exposed to a temperature of 200 degrees C. for twenty seconds;
- and
- (n−1) layers of resin paste volumetrically applied to between each of said n layers of reinforcement fibers using a volumetric paste extrusion device so as to provide alternating layers of nonwoven discrete filaments or reinforcement fibers and resin paste, wherein n is at least 2.
A sheet molding composite sheet for use in structural reinforced compression molded composite parts, the sheet comprising in an uncompacted form between a pair of outer film layers:
- a first layer of resin paste applied to one of the pair of outer film layers;
- a second layer of resin paste applied to the other of the pair of outer film layers;
- n layers of irregularly shaped reinforcement filaments or fibers;
- and
- (n−1) layers of resin paste volumetrically applied to between each of said n layers of reinforcement fibers using a volumetric paste extrusion device so as to privede alternating layer of nonwoven discrete filaments or reinforcement fibers and resin paste, wherein n is at least 2.
Dependencies are inferred from the claim text.