🧵 Textile
Dye bath heating, fabric conditioning, sizing and scouring process temperature control.
Textile — DSI Applications
Dye bath heating, fabric conditioning and sizing process temperature control
Dye Bath Heating
Textile dyeing requires the dye liquor to be brought to and maintained at the dyeing temperature — typically 60–130°C depending on the dye class and fibre type — within a tight time-temperature profile. Reactive dyes on cotton require temperatures of 60–80°C, while disperse dyes on polyester require 130°C. DSI heaters on the dye bath recirculation circuit provide rapid temperature ramp-up, controllable at ±1°C. Unlike steam coils immersed in the dye bath, DSI systems avoid local overheating that causes dye precipitation on hot coil surfaces, which ruins batch consistency and causes unlevel dyeing.
Sizing & Desizing
Warp yarn sizing applies a protective starch or synthetic size to yarns before weaving. The size must be cooked and applied at elevated temperature (70–95°C). Primetech jet cookers are used to cook the starch size before application. After weaving, desizing removes the size using hot water or enzymatic treatment — again requiring precise temperature control. DSI systems provide the controlled heat required for both operations.