Edy - Efficient Dyeing

Overview

Edy is a clean and efficient automatic textile dyeing control system. Objective of the EDY system is to provide the textile-finishing industry with an efficient, cost-effective tool for monitoring and controlling the process of fabric and yarn dyeing.
EDY provides optimal control and early detection of dyeing faults that are the basis to increase the product quality, also by giving the chance to correct wrong processes, and to reduce the waste of time and dyestuff with benefits to the production and environmental costs.
The application of EDY system provides the following advantages to dyeing industry:

• less dyeing defects on dyed product due to easier on-line correction of the dyeing recipe
• lower environmental impact of the dyeing process by avoiding wrong processes and consequently dyeing bath disposal
• lower dyeing time due to a more controlled process

This contributes to:

• Manufacturing costs: the dyeing process involves a high consumption of chemicals and energy both for fixing agents and recycling solvents. It has been estimated that these costs will be reduced by 20% due to early identification of faults and real-time correction
• Quality improvement: a prompt control of the dyeing process will avoid the production of several hundreds meters of low quality fabrics (10% of the current production is sold at 30-40% if its price)
• Production rate: production performance will take benefit from the ability to early interrupt or to in-time correct wrong processes and from the reduction of reprocess needs
• Implementation costs: the versatility of the EDY system will allow the installation by retrofit with minor impact on the dyeing process and on the plant layout.

VOPS technology

VOPS (Variable Optical Path Spectrometer) technology is based on the application of a highly efficient spectrograph and a high-precision electro-mechanical device.

The measurement device is obtained by the combination of the mecha-optic device with a linear optical sensor, that allow to turn the light spectrum in electrical signals that are acquired and processed by a micro-controller.
VOPS technical advantages respect to state-of the art probes are the following:

• provides a reliable and accurate spectral observation of the dyeing bath available throughout the whole dyeing process as it is able to modify the probe optical path and eliminate the measurement obstacle coming form the wide absorbance variation of the fluids during the dyeing process;
• allows high-speed control reactions due to the reduced measurement times resulting in high sampling rates of the process variables;
• has a compact and rugged structure that allows to be installed in extreme plant conditions.