Polyolefin fiber roll
US4669163A · kind A · utility
30Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1986 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Sep 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49554
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Acid- and caustic- resistant rolls are prepared by forming a nonwoven web of randomly laid entangled polyolefin fibers, stacking a multiplicity of segments of the web into a pile, compacting the pile under a compaction force equivalent to a room temperature compaction force of about 20.times.10.sup.5 to 55.times.10.sup.5 Pa, restraining the pile on its compacted configuration, and, if needed, dressing the sides of the compacted pile to form a smooth cylindrical surface. The preferred polyolefin fibers are formed of polyethylene, polypropylene or polybutylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.