Spectroscopic Analysis
Analytical instruments utilizing short-wave infrared radiation measure the vibrational energy of molecular bonds to identify organic compounds in fabrics. Modern textile laboratories employ swir spectroscopy to determine the chemical composition of multi-fibre blends without destroying the sample. This spectroscopic method captures the absorption of light by the overtones of hydrogen bonds in cellulose and synthetic polymers.
The analysis is completed in real time.
Moisture Detection
Water molecules absorb this light strongly at specific wavelengths, allowing for precise determination of moisture content in wet processing. Installing these sensors on the exit of a stenter frame allows the mill to measure the residual moisture of the dried fabric. This measurement prevents over-drying and saves high amounts of energy in the finishing department.
The sensor provides continuous feedback to the machine controls.
Fiber Identification
Differentiating between nylon six and nylon six-six represents a typical task where this method outperforms visual inspection. The spectrometer can detect the small differences in amide group spacing between the two polymers. This distinction is critical for recycling plants that require pure polymer streams.
Quality Control
Integrating these spectroscopic sensors into the fabric inspection table allows the mill to detect invisible sizing residues and finishing oil spots before shipment. These spots absorb the light differently than the clean fabric, generating an immediate warning for the operator. This automatic inspection step ensures consistent product quality and reduces customer complaints.
