Dyeing Challenges with Chemi Tech Low-Foam Penetrant

In 600T high-density polyester dyeing, fiber gaps of 0.3μm and spinning oils cause foam-induced dye distribution issues, leading to micron-scale white spots. A technical outdoor fabric manufacturer faced 15% spot defects in overflow dyeing machines (liquor ratio 1:15). After implementing Chemi Tech KMB-8800 low-foam penetrant:

Foam Control: KMB-8800's block polyether-silicone composite achieves dynamic surface tension ≤28mN/m (0.1s), reducing foam height to ＜2mm at 60°C (vs. ＞15mm conventionally). At 0.5% dosage, dye penetration speed accelerated to 0.08 seconds (droplet test), 5x faster than before.

Uniformity Optimization: During 130°C high-pressure dyeing, KMB-8800 suppressed foam regeneration, increasing dye diffusion coefficient by 40% and reducing ΔE from 3.2 to 0.6. K/S value fluctuation narrowed from ±1.8 to ±0.310.

Economic Impact: Eliminating defoamer additions shortened dyeing cycles by 25 minutes per batch. Fabric tear strength remained >25N, meeting outdoor gear requirements. Annual rework decreased by 120,000 meters, saving >¥900,000.

Extended to ultra-fine nylon (20D/96F) dyeing, KMB-8800 achieved zero foam in jet dyeing machines (450m/min), resolving face-to-back shading.