Why clean cotton?
Environmental pollution, cost pressures and contaminated cotton make it tough for spinners to meet rising quality demands. Foreign particles damage end-product quality. So they must be eliminated – preferably at the start of yarn production. Properly cleaned cotton is essential to reach modern quality requirements.
Conventional camera-based systems can’t match the performance of the IMAGING SPECTROSCOPE of the USTER® JOSSI VISION SHIELD T. Operating across a much greater wavelength, they can find contamination even within the ‘invisible’ range of IR and UV light. Light pastel colors, and contamination as small as a single hair, are also no problem.
White and transparent polypropylene contaminants are located through the unique scattering effect. Cotton tufts exhibit a halo effect under lighting, while plastics don’t. IMAGING SPECTROSCOPES use this effect to distinguish polypropylene from cotton.
Precise timing of ejections
The USTER® JOSSI VISION SHIELD T continuously measures the velocity of the cotton tufts. Precision valves match the timing and duration of each ‘ejection puff’ action to remove only the contaminant. So a minimum of ‘good’ cotton is wasted.