The continuous dyeing of Cotton, Polyester & their blends is gaining importance over the traditional exhaust dyeing process owing to the major advantages in terms of uniformity of shades in long yardages, high productivity, simple/ short dyeing process, low utility cost in terms of consumption of dyes, chemicals, water, energy & low effluent generation.
Considering the recent changes in the Indian textile industry & the challenges faced from the global competition, the industry is
- Moving towards Economies of Scale with latest technology
- Stringent Product quality and Safety standards
- Minimization of lead times of deliveries
- Higher pressure on Price-Trend towards high economy
- Modernisation, Automation & Re-structuring activities
- Growing importance of Brands and Retailers
- Fast changing consumer tastes
- Increasing technical support requirements by the user industry
Depending on the type of substrate, selection of dyestuffs, availability of machines & the processors choice, various methods of dyeing are adopted. Effective co-ordination between a dyestuff manufacturer, textile processor, and machinery producer has led to ongoing improvements this continuous dyeing system
Usually for reactive dyes Cold-Pad-Batch (semi-continuous), Pad-Dry-Steam, Pad-Humidifix or Pad-Dry-Pad-Steam process is used, In case of Vat dyes Pad-Dry-Pad-Steam or Pad-Dry-Cure is preferred, whereas in case of Disperse dyes Pad-Dry-Thermosol process is followed.
SDC (Symptoms, Diagnosis & Curing) Concept in continuous dyeing
Considering the importance of this emerging trend of continuous dyeing & the general problems faced by the textile processor, we feel the SDC concept would be helpful. However, in order to overcome/ minimize the processing related problems it is essential to first understand the Symptoms (problems), Diagnose (ascertain the probable cause) & Cure (adopting remedial measure).
Source: Technical Service, Atul Ltd (Colors Division), Atul - Valsad, Gujarat, India
To read about SDC Concept in Knit Processing; click here