Disperse Dye
A disperse dye is a dye used by dispersing fine, water-insoluble dye particles to dye mainly hydrophobic synthetic fibers such as polyester.
Contents5 sections
Definition and Overview
Disperse dyes are dyes that are dispersed in a dye bath as fine particles, hardly soluble in water, and then penetrate into and fix within the fibers through the action of heat. Hydrophobic refers to a property of not readily blending with water. They are mainly used for dyeing polyester and are also used for acetate and some nylon.
Unlike methods that dye by chemically bonding with fibers, such dyes are characterized by being absorbed into the fiber interior. Therefore, not only the type of dye but also the type of fiber, dyeing temperature, time, and aftertreatment affect hue and colorfastness.
Tone and Effect on Textiles
Polyester textiles dyed with disperse dyes can express a wide range from vivid colors to deep dark shades. Luster, matte feel, color development, and drape are not determined by the dye alone, but are also affected by the yarn cross-section, woven or knitted structure, processing conditions, and more.
Because heat is applied during dyeing, the heat history of the textile may affect hand feel and dimensions. In particular, with lightweight fabrics, knits, and stretch materials, it is important to check width, shrinkage rate, skewing, and surface changes after dyeing against the textile specification and the actual material.
Main Applications
They are widely used for woven fabrics and knits made mainly of polyester, and are used for shirts, blouses, dresses, pants, jackets, linings, sportswear, and more. They are adopted year-round in applications that make use of quick-drying and lightweight properties.
Disperse dyes are also closely related to sublimation printing, which uses the property of the dye vaporizing through heating and transferring to polyester. However, the processes and required control items differ between piece dyeing and sublimation printing.
- Synthetic fiber textiles such as polyester taffeta and tricot
- Polyester materials for sports and outdoor applications
- Applications that emphasize color development, such as linings, dresses, and uniforms
- Sublimation printing on polyester materials
Selection and Handling Precautions
When selecting a textile, in addition to the material blend ratio, check resistance to washing, friction, sweat, and sublimation according to the intended application. Colorfastness is an indicator of resistance to fading, discoloration, and staining of other materials. In combinations with dark colors, high-chroma colors, or light colors, confirming test results and actual use conditions is essential.
In sewing, take care to avoid glossing, tone changes, and staining caused by irons and heat presses. When combining with white or light-colored separate fabrics, tapes, interlinings, or printed components, perform press tests and washing tests in advance. Whether product washing after sewing is allowed is determined based on the textile care label and test results.
Polyester dyed with disperse dyes generally tends not to undergo the large washing shrinkage seen in cotton, but dimensional changes vary depending on the knit structure and heat-setting conditions. Confirm the shrinkage rate before mass production and reflect it in pattern and trim design.
Frequently Asked Questions
Can disperse dyes be used for materials other than polyester?
The main target is polyester, but they are also used for acetate and some nylon. However, the suitable dye, dyeing conditions, color development, and colorfastness differ by fiber. In blended or union fabrics, even dyeing in the same bath may not be uniform, so confirm the dyeing method suited to the material composition.
Does fabric dyed with disperse dyes transfer color?
Even when proper aftertreatment has been performed, dark colors may still cause staining or discoloration under conditions such as friction, sweat, washing, and heat pressing. For products combined with white or light-colored separate fabrics or trims, perform advance testing under the intended washing method and press conditions and confirm colorfastness.
What is the relationship between disperse dyes and sublimation printing?
Sublimation printing is a process that uses the property of disperse dyes vaporizing when heated and transferring to polyester fibers. Although the process differs from piece dyeing used to dye solid colors, both mainly take advantage of compatibility with polyester. The color development of the pattern varies depending on the material blend ratio and surface condition.
