Selecting the Best PET Film Thickness and Coating for DTF Printing

In the realm of digital textile printing, direct-to-film (DTF) printing has emerged as a groundbreaking technique. At the core of this process lies the judicious selection of PET (polyethylene terephthalate) film, whose thickness and coating play a pivotal role in achieving optimal print quality and transferability.

Film Thickness: A Balancing Act

The PET film’s thickness determines its strength, flexibility, and resistance to tearing. Thinner films are more pliable, allowing for intricate designs to be printed. However, they may not be robust enough to withstand the transfer process, leading to potential damage or loss of print fidelity.

On the contrary, thicker films provide enhanced durability but may compromise flexibility. As a rule of thumb, films ranging from 50 to 100 microns offer a suitable balance between strength and adaptability.

Coating: A Critical Factor

A critical aspect of film selection lies in its coating. This coating directly influences the ink’s adhesion and transfer efficiency. For DTF printing, two primary coating types exist:

Hot Peel Coating: Designed for versatility and compatibility with a wide range of inks, hot peel coatings must be heated prior to transferring to ensure optimal adhesion. This process requires specialized equipment and can be time-consuming.

Cold Peel Coating: Favored for its ease of use and time-saving benefits, cold peel coatings allow for immediate transfer without the need for heating. However, they may be more susceptible to ink bleeding and have limited compatibility with certain ink types.

Additional Considerations

Beyond thickness and coating, other factors must also be considered:

Inkjet Compatibility: Ensure compatibility between the PET film and the inkjet printer being used to avoid print issues.

Transfer Press Compatibility: Choose a film that is suitable for the specific transfer press being employed.

Transfer Temperature: Understand the recommended transfer temperature for the selected film and coating.

By carefully considering these parameters, you can select the optimal PET film thickness and coating for your DTF printing needs. This will result in vibrant prints with exceptional durability, unlocking the full potential of this transformative printing technique.