Nonwoven fabrics are formed by the random bonding of fibers, lacking the warp-weft interlacing structure of traditional fabrics. These fabrics have weak tensile resistance, and excessive tension can easily lead to issues such as tearing, deformation, and localized thinning. The high-tension conveying structure of conventional fabric dyeing equipment cannot be adapted to them. The continuous dyeing machine for nonwoven fabrics adopts a low-tension spreading processing concept, specifically designed for nonwoven fabrics, enabling the continuous padding, fixing, and washing dyeing processes for nonwoven fabrics.
The core of the equipment adopts a permeable mesh belt flat conveyor structure, with non-woven fabric smoothly fitting the mesh belt for operation. There is no clamping, pulling, or forced stretching by rollers throughout the process, which greatly protects the integrity of the fabric structure and avoids the risks of deformation and tearing. The fabric passes through the padding and dyeing unit at a constant speed, allowing the dye to penetrate evenly into the gaps of the non-woven fibers. Relying on the permeable characteristics of the mesh belt, it avoids the accumulation and flow of dye, ensuring uniform coloration on the fabric surface. After padding and dyeing, the fabric enters a low-temperature steaming and fixing section, where the dye fixing reaction is completed gently without damaging the fiber bonding structure of the fabric.
After fixing, the multi-stage spray washing system gradually removes the floating color and residual auxiliaries from the fabric surface, ensuring the purity of the fabric's color. The equipment can adjust the pad volume, steaming duration, and running speed according to different types of fabrics such as medical nonwoven, decorative nonwoven, and industrial nonwoven, adapting to differentiated dyeing requirements. The continuous processing mode ensures smooth process connection without the need for manual transfer of fabrics. The processed nonwoven fabric has uniform color, smooth surface, intact structure, and color fastness that meets the finished product usage standards for various scenarios.