Study On Spray Dyeing Technology Of Yarns With Color Fiber Circle And Its Color Matching Model

In recent years, yarn products with color fiber circle that adding one or severalcolor fiber circles in the original white yarn or color yarns get a certain development inthe textile and dyeing industry. In the enterprise, however, yarn products with colorfiber circle after sprayed dyeing often had a series of quality problems such as lowquantityof color and low color fastness, and the prediction model of spraydyeing yarnswith color fiber circle is not mature enough as well. Therefore, in this study, a simulatorfor spraydyeing of yarns with color fiber circle was built in the laboratory based on thedevice of producing yarns with color fiber circle in the enterprise. The main processfactors affecting the spray dyeing effect of different kinds of yarns were analyzed, andthe optimum processes of spray dyeing different yarns with color fiber circle with dyesor pigments were obtained.At the same time, the color matching model of spraydyeingcotton yarns with color fiber circle was studied, and the prediction of spray dyeingcotton yarns with color fiber circle with reactive dyes was good. Then the dye formulapredicted can be modified further with color matching software to meet the need ofcolor matching in production. The research contents and results are as follows.Part one: Cotton yarns were sprayed dyeing with trichromatic reactive dyes,namely reactive red RMF, reactive yellow YMF and reactive blue GD. Single-factorexperiments, orthogonal experiments and range analysis were carried out to obtain theoptimum process ofspraydyeingcotton yarns withcolorfiber circlewith reactivedyes:urea content was15g/L, sodium content was15g/L, sodium sulfate content was20g/Land steam time was20min. When the content of reactive dyes was25g/L, color depthand color fastness of cotton yarns were both good after spraydyeing of the cotton yarnswith the optimum process.Part two: Acrylic yarns were sprayed dyeing with trichromatic cationic dyes,namely cationic red R221, cationic yellow Y122and cationic blue B322. Single-factor experiments, orthogonal experiments and range analysis were carried out to obtain theoptimum process of spraydyeingacrylic yarns with color fiber circle with cationic dyes:urea content was15g/L, acetic acid content was10g/L and steam time was40min.When the content of cationic dyes was25g/L, color depth and color fastness of acrylicyarns were both high after spray dyeing of the acrylic yarns with the optimum process.Part three: Cotton/jute blended yarns were sprayed dyeing with trichromaticpigment, namely pigment magenta, pigment yellow and pigment cyan. Single-factorexperiments, orthogonal experiments and range analysis were carried out to obtain theoptimum process of spray dyeing cotton/jute blended yarns with color fiber circle withpigments: binder content was25%, baking temperature was160℃and baking timewas6min. When the content of pigment ink was5%, color depth and color fastness ofcotton/jute blended yarns were both good after spray dyeing of the cotton/jute blendedyarns with the optimum process.Part four: On the basis of optimum process of spray dyeing with reactive dyes forcotton yarns with color fibercircle, cotton yarnsandcottonfabrics were sprayed dyeingwith reactive red RMF, reactive yellow YMF and reactive blue GD respectively. On thebasis of Kubelka-Munk theory with single constant, color matching model of spraydyeing cotton yarns and cotton fabrics with color fiber circle was built. Colormatching software based on the model was used to establish a spray dyeing database,and dye formula of spray dyeing cotton yarns and cotton fabrics was predicted. As forspray dyeing after dyes were mixed, color difference between matched samplespredicted with this color matching model and standard samples was less than3, andcolor matching software can be used to correct the formula by2~3times to obtain thebest prediction formula; As for spray dyeing fabrics or yarns with dyes in order, dyeformula predicted with this color matching model can be also corrected by3~4times tomake the color difference between matched samples and standard samples satisfy theneed of spray dyeing (E<0.5). In practical situation, this color matching model canbe used to predict the spray dyeing formula of cotton yarns with color fiber circle.