Premium plaid long-sleeved pure cotton pajamas are loved by consumers for their comfortable and breathable properties. However, the problem that pure cotton fabrics shrink easily has also caused trouble to consumers. Therefore, the control of shrinkage and the improvement of the finishing process are important. Optimization is particularly important.
First of all, in the fabric production process, yarn selection and weaving technology have a significant impact on shrinkage. Selecting high-quality cotton yarn with moderate twist can make the fabric structure more stable. For example, combed cotton yarn has short fibers removed, the yarn is more uniform and smooth, and the shrinkage of the woven fabric is relatively low. At the same time, rationally adjusting the density and tension of the weaving to avoid excessive stretching or relaxation of the fabric during the weaving process can effectively reduce subsequent shrinkage. Generally speaking, appropriately increasing the weaving density to make the fabric more compact can limit fiber slippage to a certain extent, thereby reducing shrinkage.
Secondly, the pre-treatment process is a key step. Pure cotton fabrics require desizing, scouring and bleaching before dyeing and finishing. During the desizing process, it is crucial to completely remove the slurry, otherwise the residual slurry will affect subsequent processing and shrinkage. Using a suitable enzyme desizing process can efficiently decompose the slurry with little damage to the fibers. In the scouring process, impurities and natural waxes in the cotton fiber must be removed so that the fiber can fully absorb moisture and expand. Controlling the scouring temperature, time and chemical dosage can optimize the performance of the fiber and reduce shrinkage differences caused by uneven moisture absorption of the fiber. For example, controlling the simmering temperature at 95 - 100°C and the time for 60 - 90 minutes can achieve better results.
Furthermore, the preshrinking treatment in the finishing process plays a decisive role in controlling shrinkage. Mechanical preshrinking is one of the commonly used methods. Through a rubber blanket preshrinking machine or a felt blanket preshrinking machine, the fabric is squeezed and relaxed under hot and humid conditions, causing the fibers to shrink to a certain extent in advance, thereby reducing the shrinkage of the finished pajamas. Rate. The pre-shrinkage rate is generally controlled at 3% - 5%. In addition, chemical finishing agents can also be used for auxiliary treatment, such as cross-linking agents. It forms chemical bonds between fibers, enhancing fiber stability and further reducing shrinkage. However, the amount of chemical finishing agents must be strictly controlled to avoid affecting the feel and environmental performance of the fabric.
Finally, the optimized finishing process also requires strict quality testing and monitoring. Conduct a shrinkage test on each batch of premium plaid long-sleeved pure cotton pajamas, and adjust the process parameters in a timely manner based on the test results. Only through scientific and reasonable process control and continuous quality monitoring can we effectively control the shrinkage of premium plaid long-sleeved pure cotton pajamas, improve product quality, and satisfy consumers' demand for high-quality, dimensionally stable premium plaid long-sleeved pure cotton pajamas. demand and enhance the brand’s market competitiveness.
