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US 8,932,697 B2Granted
Composite material assembly
AssigneeHexcel Composites Limited
InventorsArmin Heidrich, Mark Whiter, David Tilbrook
Life of this patent
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Abstract
A composite material assembly (1) comprises a) a surface enhancing layer (5) comprising at least one layer of fibers, having a length to width aspect ratio of more than 5:1 and b) a structural layer (7) comprising at least one reinforcing fiber and at least one polymeric matrix.
Claims20
A composite material assembly having a surface and comprising:
- a) a surface enhancing layer located at the surface of said composite material assembly, said surface enhancing layer comprising a veil of fibers, said veil of fibers having a degree of openness that is from 5% to 9% and an areal weight of from 5 to 20 grams per square meter;
- b) at least one reinforcing fiber layer comprising a fibrous reinforcement and an uncured thermosetting resin matrix, said fibrous reinforcement having a surface mass of from 300 to 1500 grams per square meter;
- and
- c) a fleece layer located between said surface enhancing layer and said reinforcing fiber layer, said fleece layer comprising fibers wherein the fiber areal weight of said fleece layer is from 30 to 70 grams per square meter.
1 more element
Dependencies are inferred from the claim text.