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 dye is a dye that disperses finely divided, barely water-soluble dye particles in a dye bath and allows them to penetrate into and fix inside the fiber through the action of heat. Hydrophobic refers to a property that does not readily blend with water. It is mainly used for dyeing polyester and is also used for acetate and some nylon.
Unlike methods that dye by chemically bonding with fibers, its characteristic is that the dye is taken into the fiber interior. For this reason, not only the type of dye but also the type of fiber, dyeing temperature, time, and aftertreatment affect hue and color fastness.
Color Tone and Effect on Textiles
Polyester textiles dyed with disperse dye can express a wide range of colors, from vivid shades to deep dark tones. Luster, matte appearance, color development, and drape are not determined by the dye alone, but are also affected by the cross-section of the thread, weave or knit structure, and processing conditions.
Because heat is applied during dyeing, the thermal history of the textile may affect its hand and dimensions. In particular, for lightweight fabrics, knits, and stretch materials, it is important to check the width, shrinkage rate, skew, and surface changes after dyeing against the textile specifications and the actual item.
Main Applications
It is widely used for woven and knit goods made primarily of polyester and is used in shirts, blouses, dresses, pants, jackets, linings, sportswear, and more. For applications that make use of quick-drying performance and light weight, it is adopted throughout the year.
Disperse dye is also closely related to sublimation printing, which uses the property of vaporizing the dye through heating and transferring it to polyester. However, the processes and required control items differ between piece dyeing by dyeing in a bath 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 Notes
When selecting a textile, in addition to the material blend ratio, check the fastness to washing, rubbing, perspiration, and sublimation according to the intended use. Color fastness is an indicator of resistance to fading, discoloration, and transfer to other materials. In combinations with dark colors, highly saturated colors, or pale colors, it is essential to confirm test results and actual usage conditions.
In sewing, take care to avoid glossing, color changes, and transfer due to ironing and heat pressing. When combining with white or pale auxiliary fabrics, tapes, interlinings, or printed components, carry out press tests and washing tests in advance. Whether product washing after sewing is possible is determined based on the textile care label and test results.
Polyester dyed with disperse dye generally tends not to experience the large washing shrinkage seen in cotton, but dimensional change varies depending on the knit structure and heat-setting conditions. Before full production, confirm the shrinkage rate and reflect it in the pattern and component design.
Frequently Asked Questions
Can disperse dye be used for materials other than polyester?
The main target is polyester, but it is also used for acetate and some nylon. However, the suitable dye, dyeing conditions, color development, and fastness differ by fiber. For blended and union fabrics, uniform dyeing in the same bath may not be possible, so confirm the dyeing method suitable for the material composition.
Will textiles dyed with disperse dye transfer color?
Even when proper aftertreatment has been carried out, dark colors may still experience transfer or discoloration under conditions such as rubbing, perspiration, washing, and heat pressing. For products combined with white or pale auxiliary fabrics or components, carry out preliminary tests under the intended washing method and pressing conditions, and confirm the color fastness.
What is the relationship between disperse dye and sublimation printing?
Sublimation printing is a process that uses the property of disperse dye to vaporize with heat and transfer to polyester fibers. Although the process differs from piece dyeing for solid colors, both mainly take advantage of compatibility with polyester. The color development of the pattern changes depending on the material blend ratio and surface condition.
