How to Achieve The Goal of “Dyeing Sublimation Ink into Fibers”?

Why does the thermal sublimation pattern not “float” on the surface like offset printing and silk screen printing? Why does it not have a thick film feeling, but can still present a clear and bright pattern? All this is due to the “sublimation + penetration” principle of sublimation ink. Today, we will explore the working principle of thermal sublimation ink in depth to help you better understand and apply this technology.

Working principle

1. Sublimation of dye

The dye in thermal sublimation ink changes directly from solid to gas at high temperature. This process is called sublimation and usually occurs between 180℃ and 220℃. The sublimated dye gas can penetrate into the fibers of the substrate.

2. Penetration of dye

The sublimated dye gas penetrates into the fibers of the substrate under the action of high temperature and pressure. This process ensures that the pattern is not only attached to the surface, but also penetrates deep into the fiber, thereby achieving high durability and high adhesion.

3. Curing of dye

When the substrate cools down, the dye gas that penetrates into the fiber re-condenses into a solid state to form a solid pattern. This process is called curing, which ensures that the pattern remains bright and clear during long-term use. Simply put, thermal sublimation printing is a physical change + chemical bonding process.

Advantages of the thermal sublimation principle

1. No fading: The pattern is combined with the fiber and is not easy to wash off.
2. No glue feeling: Soft to the touch, does not affect wearing comfort.
3. High-definition restoration: Photo-level pattern details can be presented.
4. Long-lasting pattern: Anti-ultraviolet, anti-wear, high color fastness.
5. Environmentally friendly and clean: No waste liquid, no odor during the printing process.

Why can thermal sublimation technology only be used for polyester or coated materials?

This is because the sublimated dye molecules must “enter” the material itself, and the polyester molecular structure allows them to adsorb and lock the dye at high temperatures. If the material is cotton or uncoated material, the dye molecules can only float on the surface, and the adhesion will become poor.

3 details to improve the “dyeing into the fiber” effect:

1. The sublimation ink for textile concentration is sufficient, so that the color is not gray or false.
2. High quality transfer paper, balanced release rate, clearer pattern.
3. Accurate temperature + time settings to prevent edge sticking or non-adhesion.

Summary

Dye sublimation technology is becoming a powerful force in the field of personalized customization with its high efficiency, flexibility and high quality. By using heat energy to directly convert dyes from solid to gaseous state and then penetrate into the fibers of the substrate, dye sublimation technology achieves high-precision and high-durability printing of patterns. Choosing dye sublimation technology can not only improve production efficiency, but also bring significant commercial value to enterprises.