Abstract
One of the most important parameters to be controlled during the production of textile yarns obtained by mixing pre-colored fibers, is the color correspondence between the manufactured yarn and a given reference, usually provided by a designer or a customer. Obtaining yarns from raw pre-colored fibers is a complex manufacturing process entailing a number of steps such as laboratory sampling, color recipe corrections, blowing, carding and spinning. Carding process is the one devoted to transform a “fuzzy mass” of tufted fibers into a regular mass of untwisted fibers, named “tow”. During this process, unfortunately, the correspondence between the color of the tow and the target one cannot be assured, thus leading to yarns whose color differs from the one used for reference. To solve this issue, the main aim of this work is to provide a system able to perform a spectral camera-based real-time measurement of a carded tow, to assess its color correspondence with a reference carded fabric and, at the same time, to monitor the overall quality of the tow during the carding process. Tested against a number of differently colored carded fabrics, the proposed system proved its effectiveness in reliably assessing color correspondence in real-time.
Highlights
Introduction and BackgroundOne of the most relevant parameters to be taken into account when designing yarns is color, especially when dealing with wool fabrics obtained by weaving fancy yarns
0.49 CMC(2:1) units and a data mean of 1.41 CMC(2:1). These results show the effectiveness of spectral cameras for real-time measurement of yarn color
Thecolor fabric is Figure manufactured by an Italian Company named New Mill S.p.a. located in Prato, fabric one is manufactured by anhistorical
Summary
Introduction and BackgroundOne of the most relevant parameters to be taken into account when designing yarns is color, especially when dealing with wool fabrics obtained by weaving fancy yarns. Textile company colorists are required to choose the correct amount of differently pre-colored fibers to be mixed together for obtaining a desired final blend. Depending on color desired by e.g., the fashion designer, usually materially exemplified by a sample of colored fabric named “reference fabric”, textile colorists start to search their storehouse for correctly pre-colored fibers. Afterwards, they mix them (in laboratory) according to the given recipe, by using a small drum carding machine (like the one shown in Figure 1a) providing, as a result, a carded fabric sample (see Figure 1b)
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