Process for improving electrostatic charging of plexifilaments
US5643525A · kind A · utility
14Cited by
7References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1994 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Mar 25, 2014 |
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 C.sub.4 -C.sub.7 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.