Process for determining the dye uptake of polyethylene terephthalate fibers
US6710869B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Sep 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention pertains to a process for determining the dye uptake of polyethylene terephthalate fibers in which the fibers are irradiated with high-intensity monochromatic light. A light-sensitive sensor is used to measure the Raman scattering and compare it with that of an earlier established model on the basis of Raman spectra of polyethylene terephthalate fibers of known composition and structure. A model is used to calculate the density, which constitutes a quantitative measure of the dye uptake. In the calculation use is made of measurement points from a number of regions in the spectral measuring region of 598 to 1900 cm−1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.