Process for preparing a spreadable acrylic fiber tow
US4332762A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1979 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Dec 10, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2929
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Tows of highly entangled, continuous, eccentric bicomponent acrylic filaments in which the filaments have a density of about 1.0-1.17, an equilibrium crimp reversibility (ECR) of at least about 20% and a filament entanglement value greater than about 12 and less than about 60 are provided by drying previously undried tows of continuous acrylic filaments having an eccentric bicomponent structure in which a large difference exists between the hot water swellability of the components of the filaments, as indicated by their ECR, to a maximum moisture content of about 3% by weight of the filaments at a temperature below the hot-wet glass transition temperature of the fiber polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.