Particulate filled composition
US6172139A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1993 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Nov 2, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for making a particulate filled polymeric matrix composite film includes mixing a polymeric matrix material with a dispersion of particulate filler in a carrier liquid to form a casting composition and adjusting the viscosity of the casting composition to retard separation of the particulate filler from the composition. A layer of the viscosity-adjusted casting composition is cast on a substrate and the layer is consolidated to form the particulate filled polymer matrix composite film. Films made by the method include very thin, e.g less than 1.0 mil, fluoropolymeric matrix films highly filled with very small diameter, preferably spherical, particles for use as, e.g. dielectric substrate materials in laminar electrical circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.