Surface coating of sublimation paper

2025,09,16

Surface coating of Sublimation Paper

The surface coating of white sublimation paper is a functional coating located on the outermost layer of the paper. Its core function is to optimize printing accuracy, ensure smooth ink sublimation at high temperatures, and achieve easy detachment from the substrate after transfer printing, directly affecting the clarity of the transfer pattern and the cleanline

ss of the finished product.

core functionality

1. Improve printing accuracy: The coating surface is flat and smooth, allowing the nozzle of the sublimation printer to accurately control the ink landing point, avoiding ink diffusion and smudging due to rough paper surface, ensuring clear edges and complete details of printed patterns (such as text and fine line patterns).

2. Boosting ink sublimation: The material is resistant to high temperatures (180-220 ℃ transfer temperature) and will not melt, stick or react chemically with the ink at high temperatures. It can allow the ink in the ink absorbing isolation layer to sublimate smoothly and penetrate the coating, transferring to the surface of the substrate (such as fabric, ceramics).

3. Achieve easy peelability: The coating surface has low adhesion, and after transfer printing is completed, the paper can quickly separate from the substrate without leaving coating fragments, paper fibers, or ink residue, avoiding contamination of the substrate surface and reducing subsequent cleaning steps.

Common materials and technical requirements

-Main material: Mainly made of high-temperature resistant resin, commonly such as polyamide resin, polyester resin, modified acrylic resin, etc. Some products may add a small amount of lubricant (such as silane based substances) to further reduce adhesion.

-Key technical requirements:

-High temperature stability: does not soften, deform, or decompose at high temperatures, otherwise it may cause pattern misalignment or substrate contamination;

-Surface smoothness: The coating smoothness should reach the micrometer level to avoid affecting printing accuracy due to surface roughness;

-Chemical inertness: does not react with sublimation ink (containing dispersed dyes), preventing ink discoloration or failure.

The impact on transfer printing effect

-If the smoothness of the coating is insufficient, it is easy to produce "burrs" and "blurriness" in the printed pattern, especially in the transfer of fine patterns (such as logos and text);

-If the high temperature resistance is poor, the coating may stick to the substrate during transfer printing, causing "residual glue" and "marks", which can damage the appearance of the finished product;

-If the peelability is poor, it may tear the substrate (such as lightweight fabrics) or cause the pattern to peel off when separating the paper.

Author:

Ms. Esther Lin

E-mail:

jiangyinwanbang@outlook.com

Phone/WhatsApp:

+86 13915278820