What are the key production process steps of PET thermosensitive matte silver paper?

The key production process steps of PET thermosensitive matte silver paper mainly include the following stages:

First, pretreatment stage

Substrate preparation: Select high-quality PET film as the substrate to ensure the flatness, finish and dimensional stability of the substrate.

Second, coating stage

Undercoating treatment: Undercoating treatment on the PET substrate, this layer is mainly used to improve the surface characteristics of the substrate, such as increasing adhesion, improving wettability, etc., to provide a good basis for subsequent coating.

Matte silver coating: After the primer is dry, the matte silver coating is applied. Matte silver coatings usually contain specific silver pigments, binders, and other additives that precisely control the thickness and uniformity of the coating to achieve the desired matte silver effect.

Pigment selection: Use specific silver pigments that give a matte silver effect.

Adhesives and additives: Adhesives are responsible for securing the pigment to the substrate, while additives are used to improve the processability and stability of the coating.

Third, dry curing stage

Drying treatment: After the matte silver coating is finished, it is dried to remove the solvent in the coating and make the coating initially cured.

Curing treatment: Curing treatment is carried out by heating or UV irradiation, so that the adhesive in the coating is completely cured, forming a stable matte silver surface.

Fourth, post-processing stage

Surface finishing: According to the need, the matte silver surface for further finishing treatment, such as calendering, polishing, etc., to improve the surface finish and flatness.

Quality testing: The quality of the finished product is tested, including the uniformity, color saturation, adhesion, weather resistance and other aspects of the matte silver effect to ensure that the product quality meets the standard.

Fifth, take-up and packaging

Roll: The qualified PET thermal matte silver paper is rolled into a roll shape, which is convenient for subsequent processing and use.

Packaging: The PET thermal matte silver paper is packaged to protect the product from the external environment.

In summary, the key production process steps of PET thermal matte silver paper include pre-treatment, coating, drying and curing, post-treatment, as well as winding and packaging stages. Each stage requires strict control of process parameters and operating processes to ensure that the quality of the final product meets the requirements.