Shaped filamentary structures and methods of making

Details Shaped filamentary structures and methods of making Shaped filamentary structures and methods of making

C - Chemistry, Metallurgy

08

J

C08J 5/14 (2006.01) B29D 99/00 (2010.01) B29C 70/22 (2006.01) B29C 70/54 (2006.01) C04B 35/80 (2006.01) C04B 35/83 (2006.01) F16D 69/02 (2006.01)

Patent

CA 2166251

Fibrous substrates for the production of carbon and/or ceramic (including mixtures of these) fiber reinforced carbon and/or ceramic (including mixtures of these) composites and to methods of manufacture of same. A multilayered annular shaped fibrous structure (10, 40) having a radius and a thickness, suitable for use in the manufacture of a friction disk, is made by forming a multidirectional fabric (30, 50) having filaments (12) or fibers extending in at least two directions; cutting arcuate or trapezoidal sectors (20, 20') of an annular shape from the multidirectional fabric, each sector having a radial width generally corresponding to the radial width of the fibrous structure (10, 40) to be formed; assembling the sectors in end to end or circumferentially overlapping contiguous relationship to form an annular layer having a radial width generally corresponding to the radial width of the fibrous structure to be formed; providing a stack of thus formed layers of fibrous material, one layer on top of another; and needlepunching the stacked layers to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers. The multidirectional fabric is preferably a braided fabric (30) or a crosslapped fabric (50).

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