ES fiber has good moisture absorption. Under general atmospheric conditions, the moisture regain is about 13%. After moisture absorption, it expands significantly, and the diameter increases by up to 50%, so the fabric feels hard and has a large shrinkage after being put into the water.
The breaking strength of ordinary ES fiber is smaller than that of cotton, about 1.6 ~ 2.7cn/dtex; The elongation at break is 16% ~ 22% higher than that of cotton; The wet strength decreased more, about 50% of the dry strength, and the wet elongation increased by about 50%. Its modulus is lower than that of cotton, it is easy to deform under small load, and its elastic recovery performance is poor. Therefore, the fabric is easy to elongate and has poor dimensional stability. The strength of rich fiber, especially the wet strength, is higher than that of ordinary viscose, the elongation at break is smaller, and the dimensional stability is good. The wear resistance of ordinary viscose is poor, while the fiber rich is improved.
The chemical composition of viscose fiber is similar to that of cotton, so it is more alkali resistant but not acid resistant, but the alkali and acid resistance is worse than that of cotton. Rich fiber has good alkali resistance and acid resistance. Similarly, the dyeing property of viscose fiber is similar to that of cotton, with complete dyeing chromatography and good dyeing performance. In addition, the thermal properties of viscose fiber are also similar to that of cotton, and the density is close to that of cotton, which is 1.50 ~ 1.52g/cm