Process for improving electrostatic charging of plexifilaments
US6455619B1 · kind B1 · utility
1Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1995 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Oct 31, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The efficiency of electrostatic charging of polyolefin web in a process for flash-spinning polyolefin plexifilament from solution in a C4-C7 hydrocarbon, forming the plexifilament into a web, electrostatically charging the web, and laying the web down as a sheet is improved by having present in the electrostatic charging step environment a charge-improving compound, which can be any one of a number of specifically identified classes of charge-improving compounds. The charge improving compounds are present in an amount of at least 0.1 ppm of the atmosphere in that environment or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.