Bicomponent filaments with a special cross-section
US4117194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1976 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jul 21, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2973
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Side-by-side bicomponent polyester filaments, and process for making same, are disclosed, wherein the filaments are of polyethylene terephthalate and polybutylene terephthalate, with the polybutylene terephthalate being sparingly cross-linked by at least about 0.20 mole per cent of cross-linking agent. The sparingly cross-linked polybutylene terephthalate has a melted state viscosity VF of at least about 2000 poises at 260.degree. C. The polyethylene terephthalate partly envelopes the sparingly cross-linked polybutylene terephthalate, in cross-section, so as to cover at least about 45% of the periphery of the sparingly cross-linked polybutylene terephthalate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.