Thermal transfer printing film, thermal transfer film production

Thermal transfer printing film, thermal transfer film production

1. What is thermal transfer printing film
Thermal transfer printing film is a necessary medium material in thermal transfer.

Thermal transfer is a technical form in which the pattern is first printed on the base film, printed into a thermal transfer printing film, and the pattern on the film is transferred to different substrates by heating and pressurizing using thermal transfer equipment.

2. Structure of thermal transfer printing film
Thermal transfer printing film is generally composed of four layers: substrate layer, release layer, printing layer, and glue layer.

1. Substrate layer:
That is, the carrier coated with release agent, ink and adhesive, which requires the carrier to be heat-resistant, pressure-resistant and with small tensile deformation.

2. Release layer:
It is a coating of release agent. The release agent is the key to complete the separation of the ink layer (pattern) from the substrate layer (base film) and transfer to the surface of the substrate. It is required to have good wear resistance, protect color ink, reduce the intensity of ultraviolet radiation, reduce the invasion of adverse factors in the air on ink, extend the service life of ink, and buffer the adhesion of the substrate film and the printing layer.

3. Printing layer:
The ink forms a pattern transferred to the surface of the substrate by air drying. That is, the ink is the basis for forming the printed pattern.

Thermal transfer uses gravure printing technology, and the printed pattern is colorful and bright. The quality of thermal transfer ink has a certain impact on the quality of the product. High-quality ink is green and environmentally friendly and meets international non-toxic standards.

4. Glue layer:
Glue is an adhesive. Its basic performance is to have a high bonding force with the surface of the substrate to ensure that the printing layer is firmly bonded to the surface of the substrate. For products of different materials, different glues should be selected according to the material of the product.

3. Thermal transfer printing film production
The thermal transfer process, after the gravure printing plate is completed, enters the thermal transfer printing film production stage. The production of thermal transfer printing film can be simply divided into 6 processes:

1. Coating process:
According to the process of thermal transfer printing film, the corresponding release agent and protective layer are coated. After ensuring that the release agent and protective layer are dried, the blank film is cut according to the specifications of the thermal transfer printing film to be printed;

2. Printing process:
According to the established process of thermal transfer printing film, the gravure printing plate is installed on the gravure printing machine. After calibrating the overprint, the corresponding release film is installed on the gravure printing machine, and the printing of thermal transfer printing film is started, and various Printing problems of this type, ensure that the ink layer is completely dry;

3. Coating process:
After the thermal transfer printing film is printed, it will be transferred to the adhesive glue coating process. According to the established process of the thermal transfer printing film, the printed thermal transfer printing film will be coated with the corresponding adhesive glue, and the glue will be ensured to be dried;

4. Re-inspection process:
After completing the adhesive glue coating process, the thermal transfer printing film will enter the re-inspection process. The re-inspector will re-inspect the thermal transfer printing film according to the established process and inspection requirements of the thermal transfer printing film, detect defective printing products, and ensure that the quality of the thermal transfer printing film is effectively controlled;

5. Striping process:
After the re-inspection is completed, the thermal transfer printing film will be striped. According to the established process requirements of the thermal transfer printing film, after determining the film transfer direction, the thermal transfer printing film will be striped;

6. Packaging process:
According to the packaging requirements of the thermal transfer printing film, after marking the relevant process, specifications, etc. of the thermal transfer printing film, the thermal transfer printing film will be protected and packed.

At this point, the production process of thermal transfer printing film is completed.