What are the factors that affect the shrinkage rate of textiles1

Measuring shrinkage rate is one of the common detection methods for textile testing, but practice has proved that the shrinkage rate of textiles is affected by many factors. Therefore, understanding the factors that affect the shrinkage rate of textiles has positive significance for the scientificity and accuracy of the shrinkage rate measurement. The technical engineer of (Hong Kong) Co., Ltd. said that the common factors affecting the shrinkage rate of textiles are: 1. Fiber composition. Compared with synthetic fibers (such as polyester and acrylic), natural plant fibers (such as cotton, hemp) and plant regenerated fibers (such as viscose) are easy to absorb moisture and expand, so the shrinkage rate is larger, while wool is due to the scale structure on the surface of the fiber. And it is easy to felt, which affects its dimensional stability. 2. Production and processing: Because the fabric is inevitably stretched by the machine in the process of dyeing, printing and finishing, there is tension on the fabric. However, the fabric is easily de-tensioned when exposed to water, so we will find that the fabric shrinks after washing. In the actual process, we generally use pre-shrinking to solve this problem. 3. Fabric structure. In general, the dimensional stability of woven fabrics is better than that of knitted fabrics; the dimensional stability of high-density fabrics is better than that of low-density fabrics. In woven fabrics, the shrinkage rate of plain weave fabrics is generally smaller than that of flannel fabrics; and in knitted fabrics, the shrinkage rate of plain knitted fabrics is smaller than that of rib fabrics. 4. Washing and nursing process. Laundry care includes washing, drying, and ironing, each of which affects the shrinkage of fabrics. For example, the dimensional stability of hand-washed samples is better than that of machine-washed samples, and the washing temperature also affects its dimensional stability. In general, the higher the oven temperature, the worse the stability. The drying method of the sample also has a great influence on the shrinkage of the fabric. Article source: (Hong Kong) Co., Ltd.

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