Invention Grant
- Patent Title: Carbon fiber pre-pregs and methods for manufacturing thereof
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Application No.: US15211814Application Date: 2016-07-15
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Publication No.: US10358767B2Publication Date: 2019-07-23
- Inventor: Hamid G. Kia , Nicole D. Ellison , Selina X. Zhao
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Agency: Harness, Dickey & Pierce, P.L.C.
- Main IPC: B32B3/24
- IPC: B32B3/24 ; D06M15/55 ; B26D1/22 ; D06H7/02 ; B32B3/26 ; D06M101/40

Abstract:
Methods and components produced from carbon fiber pre-impregnated composite precursor materials (pre-preg) having enhanced flowability and moldability are provided. Discontinuous cut regions are introduced into a pre-preg. A sheet of pre-preg may be contacted with a patterned surface having a plurality of non-contiguous staggered cutters, so that the contacting creates discontinuous cuts in the pre-preg. A plurality of staggered discontinuous cut regions are formed in the plurality of continuous carbon fibers that define a first plurality of carbon fibers having a first length and a second plurality of carbon fibers having a second distinct length. The patterned surface may be provided on a cutter device that is a roller or a plate having the non-contiguous staggered cutters formed or disposed thereon. The discontinuous cut regions that are formed in the pre-preg reduce stiffness and improve moldability/flowability when forming carbon fiber polymeric composites, while retaining high strength levels.
Public/Granted literature
- US20180016740A1 CARBON FIBER PRE-PREGS AND METHODS FOR MANUFACTURING THEREOF Public/Granted day:2018-01-18
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