Process of making a fiber-reinforced plastic sheet having a gradient of fiber bundle size within the sheet
US5108678A · kind A · utility
57Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Apr 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249946
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a fiber reinforced plastic sheet having a gradient layer structure wherein the number of reinforcing fibers continuously varies and a process for producing the same by spreading a mixture of the fibers different in the number of filaments over the traveling zone of a conveyor and then pressing it while it contains a resin. The fiber reinforced plastic sheet of the invention is excellent in smooth appearance, fluidity during molding to an article, fiber filling ability into a complex form portion of an article and mechanical strength and can be produced inexpensively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.