Classification of Hollow fiber
Divided into two categories according to their role:
1. For flakes, the hollowness requirement is not high, about 30% to 100%. The main pursuit is lightness and warmth. In order to improve its rebound rate, it can also be made into partial core hollow fibers and formed three-dimensional curl by heat treatment;
2. For separation membranes, the hollowness and the roundness of the cross section are high, and the micropores on the membrane wall and their distribution have certain requirements. One or two different ultra-thin separation layers can also be coated to improve the separation effect and selectivity.