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US 9,551,098 B2Granted
Nonwoven batt with curved carbon fiber bundles
AssigneeSgl Automotive Carbon Fibers GmbH & Co. KG
InventorsBirgit Reiter, Martin Danzer, Gerald Ortlepp
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Abstract
A nonwoven material is composed of a nonwoven batt of a plurality of bundles formed of carbon fibers. At least some of the bundles have a curved progression that includes a curved vertex area of a first curvature between the bundle ends and at least one bundle end area of a second curvature extending from said one bundle end to the vertex. The first curvature is greater than the second curvature, in particular it is greater by at least 50%.
Claims19
A nonwoven, comprising:
- a plurality of bundles encompassing carbon fibers, said bundles having bundle ends;
- at least some of said bundles having a curved progression with a curved vertex area of a first curvature between said bundle ends, and at least one bundle end area of a second curvature extending from a bundle end to the vertex;
- said first curvature being greater in value than said second curvature.
A method for manufacturing a nonwoven, the method which comprises:
- incorporating curved bundles encompassing carbon fibers into a carding machine, the curved bundles having a curved progression with a curved vertex area of a first curvature between said bundle ends and a bundle end area with a second curvature extending from a bundle end to the vertex, wherein said first curvature is greater in value than said second curvature;
- operating the carding machine in such a way as not to completely isolate the bundles into single fibers, but rather to intertwine carbon fibers in the bundle with additional fibers;
- and
- removing the nonwoven from the carding machine.
1 more element
Dependencies are inferred from the claim text.