Chemical fiber knitted grey fabric not only carries oil and impurities from the spinning and weaving processes, but also exhibits a characteristic of shrinking when exposed to water. Without pretreatment, irregular shrinkage may occur during subsequent wet processing of chemical fiber knitted fabric, leading to issues such as unstable finished product dimensions, width deviation, and poor fabric flatness. The refining, shrinking, and washing machine integrates oil refining and removal with fabric pre-shrinking and setting into a single process, completing the pretreatment of chemical fiber knitted grey fabric in a one-stop manner.
The front section of the equipment is the refining and degreasing area, where specialized refining auxiliaries and appropriate temperature are used to emulsify and decompose surface oils, stains, and impurities, thoroughly cleaning the oil residue on the fiber surface, restoring the hydrophilic properties of the fabric, and laying the foundation for subsequent dyeing processes. After refining and degreasing, the fabric enters the dedicated relaxation and preshrinking area, where sufficient relaxation space is reserved in the equipment to allow the chemical fiber fabric to freely shrink without forced stretching or compression constraints, releasing the internal stress of the fabric and completing the shrinkage deformation in advance.
After preshrinking, the fabric undergoes multi-stage gentle washing to strip away residual refining agents and oil decomposition products, ensuring a clean surface. The equipment can adjust refining temperature, relaxation dwell time, and running speed according to the chemical fiber material and fabric weight, precisely controlling the fabric shrinkage rate. The integrated processing mode simultaneously solves the two major problems of oil residue and fabric shrinkage. The chemical fiber knitted grey fabric processed by the equipment has thorough removal of impurities and sufficient release of internal stress, resulting in smaller dimensional changes during subsequent processing and use, and significantly improved stability of the finished product.