Polyester fabrics are popular for their crispness, wrinkle resistance, and durability. But this toughness creates challenges in dyeing. Polyester has a tight molecular structure and lacks reactive groups. So dyeing requires disperse dyes under high temperature and high pressure. When the temperature reaches 130°C, dye molecules move violently. They collide and aggregate easily. This forms color spots, specks, or uneven shades on the fabric surface.
These defects turn valuable greige goods into seconds. They force mills to rework frequently. This raises costs and delays delivery. It is a constant headache for dyers.
Lianzhuang technology developed TEXNOLOGY®RH12 high‑temperature leveling agent to solve these problems. It is not a single‑function additive. It builds a three‑in‑one protective system: dispersing, retarding, and migrating.
First protection: stops dye aggregation at the source
TEXNOLOGY®RH12 uses a special surfactant blend. It has suitable affinity for both polyester fibers and disperse dyes. During dyeing, it wraps dye molecules through solubilization and colloidal protection. This keeps them evenly and stably suspended, even at high temperatures. This proactive step eliminates the root cause of dye aggregation. Color stains and specks lose their chance to form.
Second control: regulates the dye uptake rate
Uneven dyeing often comes from too‑fast initial uptake. TEXNOLOGY®RH12 has excellent initial retarding ability. It suppresses the “instant dyeing” effect at the start. This prevents local over‑dyeing. It allows dyes to exhaust in an orderly manner, giving uniform results inside and out. More importantly, it has strong migrating power. When it finds a spot that is too dark, it actively desorbs the dye and moves it to lighter areas. It corrects shade differences and unevenness during the process, until the whole batch reaches high uniformity. This significantly improves first‑pass yield.
TEXNOLOGY®RH12 high temperature leveling agent
Third guarantee: true color and good fastness
While solving leveling issues, TEXNOLOGY®RH12 does not sacrifice dye uptake for uniformity. It faithfully reproduces the target shade. It ensures bright, full color without harming wash, rub, or light fastness.
In addition, TEXNOLOGY®RH12 has low foaming properties. This prevents tangling and wandering in jet dyeing machines. It ensures smooth production. It has broad compatibility and works with non‑ionic and anionic auxiliaries in the same bath. For high‑temperature, high‑pressure dyeing of polyester and its blends, it is a reliable choice to improve first‑pass yield and reduce defects.
Guangzhou Lianzhuang Technology Co., Ltd. is a technical company that focuses on the R&D, production, and application of textile printing and dyeing auxiliaries. With over 20 years of industry experience, we provide a one-stop solution for textile printing and dyeing supply chain companies. Our products include ✅ pretreatment auxiliaries, ✅ dyeing auxiliaries, and ✅ finishing auxiliaries. We follow the philosophy “Let technology for life.” We develop customized functional finishes for fabrics, such as antibacterial, waterproof, flame retardant, softener, and antistatic treatments. For custom functional auxiliaries or technical discussions, please call: +86 18054231589.
