Search results
Results from the WOW.Com Content Network
Dope dyeing: In dope dyeing, pigments are added to the polymer solution itself before extruding the fibers. The process provides the dyed fibers with excellent fastness properties. The dope dyeing applies to synthetic fiber only. This method of dyeing is also known as solution dyeing [10] and 'mass coloration' or 'mass colored'. It has limited ...
Dyeing is normally done in a special solution containing dyes and particular chemical material. Dye molecules are fixed to the fiber by absorption, diffusion, or bonding with temperature and time being key controlling factors. The bond between dye molecule and fiber may be strong or weak, depending on the dye used.
The beam dyeing machine is optimally used for the dyeing of knit and woven fabrics. The beam dyeing process involves the movement of the dye solution, while the fabric remains stationary. [15] The dye liquor is created using a low specific liquor ratio ranging around 1:5. [16] The process requires a high temperature for the dye solution.
Dyeing is one of the most polluting and pricey processes in the fashion industry — and Jeanologia, a Spain-based sustainable solution textile firm, seeks to minimize environmental impacts with ...
Dye is used to color fabric. There are two main types, natural dyes and synthetic dyes. The process is called dyeing. dye lot The dye lot is a number that identifies yarns dyed in the same vat at the same time. Subtle differences can appear between different batches of the same color yarn from the same manufacturer.
The fabric passes over rollers, immerses into a dye bath, and then proceeds through rollers that remove excess dye, allowing it to return to the dye container. [8] The difference between piece-dyeing in a vat and using a pad-dyeing machine is that in the latter, the fabric is continuously moved through one or more dye baths, rather than being ...
At the Lyocell mill, rolls of pulp are broken into one-inch squares and dissolved in N-methylmorpholine N-oxide (NMMO [2]), giving a solution called "dope". The filtered cellulose solution is then pumped through spinnerets, devices used with a variety of synthetic fibers. The spinneret is pierced with small holes rather like a shower head; when ...
Traditional dyeing means first producing the fiber and then dipping the fiber in dye to add the color. This requires a lot of hot water and liquid chemicals. Solution dyeing means adding the color pigment earlier in the manufacturing process, when the polyester is just little pellets.