Process Explanation Of Modal Fiber And Spandex Fiber

Modal fiber is a high wet modulus regenerated cellulose fiber, which has the characteristics of low wet and dry elongation, high wet modulus, high purity, low water content, good alkali stability and good affinity for dyes. Modal dyed fabric can be dyed with reactive dyes. Because of its sensitivity to dyes, it is easy to produce defects such as Mao Yu, scratches and creases in dyeing and finishing. Therefore, it is necessary to take slow rise and fall temperature during processing, and dye, sodium sulfate and soda ash should be added separately. Modal fabric Wearing very comfortable, but the surface is easy to fuzz and pilling defects, according to the requirements of modal products for the corresponding finishing (such as polishing, softness, antistatic, anti pilling, etc.).

Modal fiber, made from European beech pulp, is a new generation of regenerated cellulose fiber with high wet modulus. It is a special viscose fiber. It has not only the hygroscopicity of natural fibers, but also the strong flexibility of synthetic fibers. More importantly, the production process of the fiber is clean and non-toxic. The waste of its textile can also be naturally biodegradable and has good environmental protection performance. It has been regarded as one of the most potential green fibers in the century by the textile and garment manufacturers. In addition to some characteristics of viscose fiber and cotton fiber, modal fiber has its own unique characteristics. The fabric produced by modal fiber has silk luster, high quality mercerized cotton style, soft and delicate handle, good drapability and wearability. Modal / Spandex Knitted fabric has good elasticity and is the first choice of high grade fabric. But in the process of dyeing and finishing, modal abrasions, creases, and wide kits are prone to be unstable. It is easy to produce Mao Yu and easy pilling on the surface of fabrics, which seriously affects the quality of cloth and reduces the grade of knitted fabrics. In view of the characteristics of modal fiber, our company has repeatedly launched a set of pretreatment, dyeing and finishing processes after repeated tests. Modal fiber The wearability is better.

Before treatment, the fineness of modal fiber is smaller than that of cotton fiber. The fineness of the fiber is equivalent to the fineness of L7 to 8 TX cotton. The cross section of the fiber is uniform and round, and there is no three-dimensional curl in the longitudinal direction. With the increase of the number of yarn cross sections and the smooth surface of the fibers, more fiber ends are removed from the yarn during wet finishing and processing, resulting in the tendency of pilling and pilling on the surface. Therefore, it is necessary to maintain low tension and low speed as far as possible in every process, so as to reduce friction and reduce the occurrence of fuzzing, pilling and breaking. In the actual production process, we must pay attention to the following points. The processing must be completely disseminated; the fabric is facing the fold and buckle, so that the fabric can be processed in the front side, reducing the friction between the surfaces of the fabric; using a larger bath ratio as far as possible, adjusting the bath ratio by 0 to the different fabric, and adding softeners in the antistatic bath in the bath to reduce the friction between the fabrics, keeping the fabric in a mild motion state during bleaching, dyeing and finishing, controlling the temperature, avoiding boiling phenomenon, and controlling the speed of the dyeing machine.

One bath process for boiling and bleaching. Modal Spandex fiber The knitted fabric usually does not need to bleach. As long as it is lightly scoured, it can remove the oil and wax from spinning and weaving. If most of the products used for dyeing bright colors or modal and cotton blended products are bleached, in order to save energy and reduce production costs, the process of bleaching and bleaching in one bath should be based on the proportion of fabrics.