Introduction
In DTF printing, most attention is directed toward layers that directly interact with ink, powder, or transfer processes. These layers define how an image is formed and how it behaves during application.
However, beneath all functional coatings lies a foundational material that supports the entire system. This base material does not participate in printing directly, but defines the physical structure on which all other layers depend.
This concept is part of the Structural Architecture of DTF Film, which defines how layered film systems are constructed and stabilized from the ground up.
What Is Base PET Film
Base PET film is the foundational carrier layer that defines the physical structure and dimensional stability of the DTF film within the DTF system.
It serves as the substrate onto which all functional coating layers are applied, forming the base of the layered film architecture.
This layer is not a functional coating but a material substrate that supports the entire coating system.
How Base PET Film Functions in the DTF System
Within the DTF system, the base PET film functions as the structural foundation of the film.
Its role is to:
- Provide dimensional stability for the coating stack
- Support the application of layers such as the front coating layer and release layer
- Maintain flatness and consistency during handling and processing
- Serve as the carrier medium during transfer
It operates as the physical base layer beneath all functional coatings, enabling the layered system to exist as a unified structure.
What Base PET Film Does NOT Do
Base PET film does not control ink absorption.
Base PET film does not define release behavior.
Base PET film does not regulate powder adhesion.
Base PET film does not control electrical charge behavior.
Base PET film does not replace functional layers such as the ink receptive layer or the anti-static layer.
It serves as a structural substrate rather than a functional interaction layer.
Structural Nature
Base PET film belongs to the foundational structural system of the DTF film.
It is positioned beneath all coating layers and forms the base upon which the layered architecture is constructed.
Unlike coating layers, it is not applied but exists as the primary material substrate.
All functional layers—including the ink receptive layer, release layer, and other intermediate coatings—are built upon this base.
Performance Boundaries
Base PET film operates within defined boundaries such as:
- Thickness tolerance
- Dimensional stability
- Thermal resistance
- Surface compatibility with coatings
Outside these boundaries, the structural behavior of the film may vary.
Base PET film does not control performance beyond its role as a structural carrier.
Common Misunderstandings
Base PET film is often assumed to be a passive or neutral component.
It is sometimes interpreted as interchangeable across different film constructions.
Another common misunderstanding is that PET film determines printing performance directly.
In reality, it defines structural conditions rather than surface interaction behavior.
It is also frequently confused with coating layers, despite serving a fundamentally different role.
Where Base PET Film Sits in the System
Base PET film sits at the bottom of the DTF film structure.
A simplified structure includes:
- ink receptive layer
- release layer
- front coating layer
- Base PET Film
Back side:
Functional overlay:
This layered configuration is defined within the Structural Architecture of DTF Film.