Structural Analysis
The utilization of high-energy radiation to determine the atomic and crystalline arrangement of a solid material provides data on its physical properties. For flax fiber evaluation, x-ray diffraction reveals the crystallinity index and the orientation of the cellulose chains within the fiber walls. This crystallographic information correlates with the tensile strength and chemical reactivity of the flax during dyeing and finishing.
In Chinese laboratories, this analytical method helps to benchmark raw fiber shipments against the buyer’s mechanical requirements.
Testing Procedure
Analyzing the fiber requires placing a parallel bundle of flax stems in the goniometer of the diffractometer and scanning over a range of angles. This scan produces a diffracted intensity pattern that displays characteristic peaks for the cellulose crystal planes. By measuring the area under these peaks, technicians calculate the ratio of crystalline to amorphous regions in the fiber structure.
The mill files this laboratory report in the quality assurance folder for each processed bale batch.
Yarn Assessment
High crystallinity scores indicate fiber that will produce yarn of high tenacity and low elongation. This microstructural data helps the spinning mill select the correct processing parameters for wet spinning. The final quality report includes these diffraction values as a guarantee of fiber excellence.
