Method for preparing yarn with cloud dyeing effect

The patent segments the dyeing process by introducing multiple independently flowing dye streams (each with different colors) instead of using a single uniform dye solution. Each dye stream maintains its own flow characteristics and color identity, allowing multiple colors to coexist in the final yarn without complete mixing, thus achieving cloud dyeing effect with multi-color variety.

The patent applies local quality by creating spatial variation in color distribution within the yarn cross-section. Different regions of the yarn contain different dye concentrations and color combinations, resulting in the characteristic cloud-like multi-color effect. The dye streams are arranged to create specific local color patterns as they solidify into fiber.

The patent performs preliminary dyeing action during the fiber formation stage itself, rather than dyeing the finished fabric later. By incorporating multiple colored dyes into the spinning solution and maintaining their separation through controlled flow during extrusion, the cloud dyeing effect is achieved in-situ during fiber production, eliminating the need for subsequent printing and dyeing processes that would consume large amounts of water and resources.

The patent merges the dyeing function with the fiber production process. The spinning and dyeing operations that are traditionally separate and sequential are combined into a single integrated process where multi-color dye streams are incorporated during fiber extrusion and solidification, achieving both fiber formation and coloration simultaneously without additional water-intensive steps.