The hot-melt pad dyeing process for shuttle-woven chemical fiber and cotton-linen blended fabrics involves multiple steps, including dipping in the dyeing solution, pre-drying, hot-melt fixing, and reduction washing. Traditional segmented equipment requires segmented processing and manual transfer of fabrics, which not only results in low production efficiency but also easily leads to defects such as fabric stains, wrinkles, and color differences during the transfer process. The continuous hot-melt pad dyeing machine integrates all core pad dyeing processes, enabling continuous and integrated dyeing and processing of fabrics.
The fabric is fed into the equipment at a constant speed in a flat state. It first passes through a precise padding unit, where controlled roller pressure allows the dye solution to penetrate evenly into the warp and weft gaps of the fabric, ensuring uniform liquid content on the surface and avoiding issues of uneven color shading. Subsequently, the fabric enters a pre-drying section, where gentle heat removes the free water on the surface, preventing dye accumulation and flowing, which can cause color irregularities. After drying, the fabric enters a closed hot-melt oven, where the dye melting, penetration, and fixation reactions occur in a stable high-temperature environment, forming a stable bonding structure between the dye and the fiber.
After the fixing process, the equipment automatically connects to the reduction soaping and multi-stage countercurrent washing units to promptly clean the floating colors and residual auxiliaries on the fabric surface, locking the color of the fabric. The air ducts inside the oven are evenly distributed, ensuring full heating coverage and balanced temperature on the fabric surface, without local overheating or insufficient temperature. The equipment's speed, temperature, squeezing pressure, and dye solution supply can be precisely adjusted to accommodate different materials and weights of shuttle-woven fabrics. The integrated continuous processing mode simplifies the production process, reduces manual intervention, and achieves better color consistency among batches of fabrics, making it suitable for large-scale dyeing production.