Composite material having at least one twisted thread deposited therein
AssigneeHexcel Reinforcements
InventorsJean-Marc Beraud, Alain Bruyere
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Abstract
The invention relates to a composite material in which at least one reinforcement thread is deposited on a surface according to a path having at least one curved area on the deposition surface, wherein the reinforcement thread is connected to the surface by a polymeric binder. A twist is applied to the reinforcement thread before the deposition thereof at least in order to compensate the length differences of the extreme paths of the thread on either side of the width as measured in a direction parallel to the deposition surface.
Claims20
A composite material comprising a twisted reinforcement thread that is located along a curved path on a surface, said curved path having a minimum internal radius and a length, said twisted reinforcement thread comprising from 3,000 to 24,000 filaments that are parallel to each other, said reinforcement thread having external edges defining the width of said reinforcement thread and a middle, wherein the width of said reinforcement thread is from 1 to 12 mm and wherein the filaments located along the external edges of said twisted reinforcement thread have been rotated a sufficient number of times around the filaments located in the middle of said twisted reinforcement thread to produce said twisted thread which has from 5 to 100 turns per meter of curved path length.
A composite material according to claim 3 wherein said twisted reinforcement thread has from 10 to 80 turns per meter of curved path length.
A composite material according to claim wherein a polymeric binder is located on said surface.
A composite material according to claim wherein said polymeric binder is located on said twisted reinforcement thread.
Dependencies are inferred from the claim text.