Process for forming improved foamed fibers
US4753762A · kind A · utility
16Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1985 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Jul 8, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/13
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of forming foamed fibers which comprises the steps of forming a melt of a polymer of fiber-forming molecular weight in which is admixed a blowing agent, and a closed-cell-forming additive, extruding said melt through a spinnerette, quenching said melt downstream of said spinnerette under conditions at which bubbles form in said melt, and drawing said melt as it is quenched to produce a foamed fiber having fine bubbles contained therein is disclosed. The product fibers may contain substantially only closed-cells and/or substantially uniform cross sectional area cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.