Bituminized roof sheet
US3967032A · kind A · utility
28Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Sep 5, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bituminized roof sheet has particular dimensional stability and strength when containing a spun fleece of polyester filaments reinforced in a quite special manner as carrier. The roof sheet has the following properties: PA1 A. a tensile strength of from about 30 to 100 kp/5 cm, PA1 B. an elongation at break of from about 20 to 60 %, PA1 C. an elastic strain of from about 1 to 5 %, PA1 D. a tear propagating strength of from about 2 to 8 kp, PA1 E. a nail plucking resistance of from about 13 to 30 kp, and PA1 F. a flexural strength of more than 5000 cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.