Compositions including treated Kraft pulp, useful for making rayon fibers, having a lower degree of polymerization, a high R18, a low hemicellulose content, and high reactivity, are described. Methods of making the compositions are also described.

A rinsing device for refined cotton is provided, and relates to the technical field of refined cotton processing. The rinsing device for refined cotton includes a rinsing unit. An auxiliary unit is installed inside the rinsing unit, and the auxiliary unit is used for extruding excessive moisture in the refined cotton. A stirring unit is installed on the rinsing unit. A linkage unit is installed on the auxiliary unit and the stirring unit. A blocking unit and a collecting unit are installed at the bottom of the rinsing unit, and the collecting unit is located below the blocking unit. The rinsing device for refined cotton has the advantages that refined cotton pulp after rinsing may be quickly extruded and filtered, the product quality is stabilized, and at the same time, the bleaching and rinsing efficiency is improved.