Thermal sublimation paper ink absorption isolation layer

2025,09,15

Thermal Sublimation Paper ink absorption isolation layer

The ink absorbing isolation layer of sublimation paper is the core functional layer between the substrate layer and the surface coating. Its core function is to accurately carry sublimation ink and prevent ink from penetrating into the substrate layer, while laying the foundation for subsequent high-temperature sublimation transfer printing.

core functionality

1. Precise ink holding and control: Through the porous structure inside the coating, the sublimation ink during printing is uniformly adsorbed, so that the ink only stays on the surface or shallow layer, avoiding ink waste and incomplete transfer caused by penetration, and ensuring that the ink can sublimate completely during transfer.

2. Isolation protection: Thoroughly block the penetration of ink into the lower substrate layer to prevent the substrate (such as wood pulp paper) from absorbing ink and causing problems such as color fading and blurred patterns in transfer printing. At the same time, protect the substrate layer from the chemical composition of the ink.

3. Adjust drying speed: The coating composition can control the ink drying time, which not only avoids ink breakage caused by too fast ink drying, but also prevents pattern smudging caused by too slow drying, ensuring clear and complete printing patterns.

Common materials and technical characteristics

-Main materials: With porous resin as the core, commonly used materials include polyvinyl alcohol (PVA), acrylic resin, modified starch, etc. Some high-end products may add nanoscale fillers (such as silica) to optimize the pore structure.

-Technical features: Uniform micrometer sized pores need to be formed inside the coating, and the pore size needs to match the particle diameter of the sublimation ink (usually 0.1-1 μ m), ensuring that the ink can be firmly adsorbed and quickly released at high temperatures (180-220 ℃) without chemical reactions with the ink.

Key performance indicators

-Ink absorption capacity: It needs to be compatible with the type of sublimation ink (water-based, oil-based). If the ink absorption capacity is too low, it may cause ink accumulation and smudging, while if it is too high, it may cause ink residue during transfer printing, affecting color density.

-Ink impermeability: It is a core indicator. If the impermeability is poor, ink will penetrate into the substrate layer, which will directly cause the color of the transferred pattern to be dull and details to be lost.

-High temperature resistance: It is necessary to withstand the high temperature during transfer printing, avoid coating softening, deformation, or fusion with ink, and ensure that ink can sublime and detach normally.

Author:

Ms. Esther Lin

E-mail:

jiangyinwanbang@outlook.com

Phone/WhatsApp:

+86 13915278820