What are the key production process steps for PET thermal matte silver paper?

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

1. Pretreatment stage
   Substrate preparation: Select high-quality PET film as the substrate to ensure the flatness, smoothness and dimensional stability of the substrate.
2. Coating stage
   Primer treatment: Primer treatment is performed on the PET substrate. This layer is mainly used to improve the surface properties of the substrate, such as increasing adhesion and improving wettability, etc., to provide a good foundation for subsequent coating.

Matt silver coating coating: After the primer is dried, the matte silver coating is applied. Matt silver coating usually contains specific silver pigments, adhesives and other additives, and the thickness and uniformity of the coating are precisely controlled to achieve the desired matte silver effect.

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

Adhesives and additives: The adhesive is responsible for fixing the pigment on the substrate, and the additives are used to improve the processing performance and stability of the coating.

3. Drying and curing stage
   Drying treatment: After the matte silver coating is applied, drying treatment is performed to remove the solvent in the coating and initially cure the coating.

Curing treatment: Curing treatment is carried out by heating or UV irradiation to completely cure the adhesive in the coating and form a stable matte silver surface.

4. Post-processing stage
   Surface finishing: Further finishing treatment is carried out on the matte silver surface as needed, such as calendering, polishing, etc., to improve the surface finish and flatness.

Quality inspection: Quality inspection of the finished product, including tests on the uniformity of the matte silver effect, color saturation, adhesion, weather resistance, etc., to ensure that the product quality meets the standards.

5. Winding and packaging
   Rolling: The qualified PET thermal matte silver paper is rolled into a roll for subsequent processing and use.

Packaging: The rolled 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 pretreatment, coating, drying and curing, post-processing, winding and packaging. Each stage requires strict control of process parameters and operating procedures to ensure that the quality of the final product meets the requirements.