Uses Water - soluble fibers are widely used in papermaking, medical non - woven fabrics, feminine sanitary napkins, spinning high - count yarns, making twistless yarns, and serving as embroidery backing fabrics, etc. For example, when using water - soluble vinylon top for blending to produce high - count light - weight woolen fabrics, there is no need to emphasize the use of high - quality wool. Instead, a certain proportion of vinylon water - soluble top is added during the spinning process for blending. This not only meets the requirement for the number of fibers in the yarn cross - section but also improves the spinnability of the yarn. After weaving on the loom, vinylon is removed during the post - finishing process, resulting in a light - weight and fluffy woolen fabric, which enhances the grade of the woolen fabric. Its blending mechanism is to blend 10% - 20% of water - soluble vinylon top with wool top for spinning to make fabrics, and then remove the water - soluble vinylon during the dyeing and finishing stage. This can increase the wool count by about 20%, thus obtaining high - count woolen fabrics.