Disperse Dyes

Advanced Technology Coloration for Polyester and Hydrophobic Fibers

As the dominance of synthetic fibers, especially polyester, increases in the textile world, the technologies used to color these hydrophobic (water-hating) structures have also gained critical importance. Disperse dyes are the only class of dyestuffs that provide excellent coloration by establishing physical bonds with hydrophobic fibers like polyester, thanks to their non-ionic structures and very low solubility in water.

The disperse dye series offered under the brand Priopers  in the market provide solutions across a wide range, from standard dyeing processes to technical textiles requiring high performance.

Working Principle and Properties of Disperse Dyes

Unlike cellulosic dyes, disperse dyes are based on a principle of physical and mechanical transition rather than a chemical bond.

• Physical Bonding (Solid Solution): During the dyeing process, the pores of the fiber open under high temperature and pressure. Very finely ground disperse dye molecules enter through these pores. During the cooling phase, the pores close, and the dye is trapped inside the fiber.
• Hydrophobic Structure: Fibers such as polyester, acetate, and triacetate are water-repellent. Disperse dyes adapt to this structure and penetrate deep into the fiber.
• Sublimation Ability: Disperse dyes have the ability to transition from a solid state to a gas state (sublimation) under heat. This feature plays a decisive role in the classification of the dye and in printing techniques.

Priopers Brand and Disperse Dye Classification (E, SE, S Types)

Every textile product's area of use and dyeing process is different. Priopers Disperse Dyes provide flexibility to businesses by being classified into three main categories based on their molecular sizes and sublimation fastness (heat resistance):

1. E Type (Low Energy)

• Properties: They have a small molecular structure.
• Advantages: They enter the fiber very quickly and have excellent leveling (migration) properties.
• Usage Area: They are generally preferred for dyeing light shades and for products where leveling is critical, such as carpets. Their sublimation fastness is low.

2. SE Type (Medium Energy)

• Properties: They have a medium-sized molecular structure.
• Advantages: Both leveling ability and sublimation fastness are balanced.
• Usage Area: It is the "medium molecule" group that provides process flexibility and can be safely used in many general textile products.

3. S Type (High Energy)

• Properties: They have a large molecular structure.
• Advantages: They are very resistant to high temperatures and subsequent thermal processes (stenter, pleating, etc.) (High sublimation fastness).
• Usage Area: Ideal for dark shades, continuous dyeing systems (Thermosol), and printing grounds.

High Performance Series: F-LW

The sportswear (activewear) and outerwear market has quality expectations far above standards. Perspiration fastness, frequent washing resistance, and light fastness are indispensable for these products. Priopers has developed special series for these niche areas:

Priopers F-LW Series: Designed for products requiring high washing fastness. Minimizes the risk of color fading and cross-staining during washing.

Comparison Table: Which Priopers Type Should Be Selected?