Composite bituminous sheet, particularly for sealing members
US4278724A · kind A · utility
3Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | Dec 6, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31815
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention relates to a composite bituminous sheet, particularly useful for sealing members. Said sheet consists of a main or external zone (1) formed of a cloth which is substantially non-extensible under low stress surrounding at least one central zone (2) to which it is bound, which is formed of an extensible elastic cloth having a tensile elongation at break of at least 100%, the central and external zones being coated with the same bituminous composition having a high elongation at break and a softening point at least equal to 100.degree. C. when determined according to the standard Ring and Ball test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.