Fabric wet treatment finishing - comprises impregnating and preheating before main dryer preceding simultaneous drying and tentering step

摘要

The preheating which follows impregnation is done from both sides of the fabric at above 100 deg.C, the main dryer operating at 120-140 deg.C, and under suction of 80-100 kgf per sq.m. to reduce moisture content to 30-40%. Subsequent tentering and drying (6) is at 120 to 150 deg.C to reduce moisture content to 0.5 to 1%. Final flash-heating is at 170-200 deg.C for 3 to 10 secs., pref.by infrared heaters in a sealed chamber. Compact installation capable of 90 to 12 m. per min. throughput speed is achieved.