Method for producing thermosetting composite parts by drape forming of preimpregnated material
US9821491B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Oct 8, 2013 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Feb 24, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for fabricating a partially polymerized prepreg material. Fibers are impregnated with thermosetting resin. The resin is partially polymerized to a degree of polymerization between 10% and 60%. The thermosetting composite parts are produced by drape forming of the prepreg material. The material laid-up in the form of tapes and heated at a temperature above the glass transition temperature of the prepreg state. The laid-up material is pressed and cooled to return the laid-up material to a temperature below the glass transition temperature of the prepreg state in question.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.