Thermoplastic polyurethanes in optical fiber coatings
US9688574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2012 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Dec 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02395
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for correcting defects in a primary coating on a glass optical fiber involves providing an optical fiber configured for propagation of an optical signal, coating the optical fiber with a composition comprising a thermoplastic polyurethane and at least one acrylate monomer, curing the composition to form a relatively soft primary coating covering an outer surface of the optical fiber, the primary coating being a thermoplastic product of the polyurethane and the at least one acrylate monomer, coating the optical fiber with at least one relatively harder secondary coating layer disposed over the primary coating, heating the coated fiber to a temperature above the melting temperature of the thermoplastic product to cause the primary coating to flow and correct defects, and cooling the coated fiber to a temperature below the melting temperature of the thermoplastic product to provide a substantially defect free primary coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.