Synthetic filament-reinforced polymer material sheet and process for producing the same
US4874658A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1987 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Sep 10, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249947
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A synthetic filament-reinforced polymer material sheet having a very small thickness of 0.25 mm or less and a large specific tensile strength of 3.4.times.10.sup.6 cm or more is composed of a reinforcing sheet in which a number of straightened individual synthetic polymer filaments are arranged in parallel to each other and are spaced from each other at an average interval not larger than the average thickness of the filaments, and which has a width W anmd a thickness T satisfying the relationship W/T.gtoreq.40 and a coefficient of variation of thickness of 30% or less, and a polymer material impregnated in the spaces between the individual filaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.