Bicomponent fibers and webs made therefrom
US4547420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1983 |
| Grant date | Oct 15, 1985 |
| Priority date | — |
| Expiry date | Oct 11, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/638
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Bicomponent fibers, and webs made therefrom, are taught in which one component of the fibers is a crystallizable material. When a web of the fibers is heated in a mold above the temperature at which crystallization occurs, the fibers tend to be set in the position they are held in the mold. A preferred fiber comprises blown fibers comprising as one component amorphous, crystallizable polyethylene terephthalate, and as the other component polypropylene. A web of such fibers not only becomes formed into a shape-retaining form by crystallization during the molding process, but also can be further established in its shape-retaining character by heating the web above the softening point of the polypropylene, whereupon the fibers become bonded at their points of intersection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.