What are the current mainstream PET thermosensitive matte silver paper production technologies?

At present, the mainstream production technology of PET thermal matte silver paper mainly involves many aspects, including raw material treatment, coating formulation design, coating process, drying and curing, and post-treatment. The following is a detailed summary of these technologies:

1. Raw material processing

PET substrate preparation: Select high-quality PET film as the substrate to ensure that it has good mechanical properties and chemical stability. PET substrates need to undergo surface cleaning and pretreatment, such as corona treatment or plasma treatment, to improve the adhesion of the coating to the substrate.

2. Coating formula design

Thermal coating formula: Thermal coating is the core part of PET thermal matte silver paper, and its formula design is directly related to the printing effect and performance. The coating formulation usually contains a variety of ingredients such as thermistor, color developing agent, adhesive, dispersant, and lubricant. The proportions and types of these ingredients need to be precisely tailored to specific needs.

To achieve a matte silver effect, a specific matte or matte agent may be added to the coating formulation to create a matte surface after printing.

3. Coating process

Precision coating: Precision coating equipment is used to evenly coat the thermal sensitive coating on the PET substrate. Coating process needs to control coating speed, coating amount, coating temperature and other parameters to ensure uniform coating thickness and no defects.

Multi-layer coating: Depending on the need, multi-layer coating technology may be used to form a multi-layer structure on the PET substrate to improve the overall performance of the product.

4. Drying and curing

Hot air drying: The coated PET thermal matte silver paper needs to be dried by hot air to remove the solvent and moisture in the coating and allow the coating to cure and form.

UV curing: Some high-end products may use UV curing technology, which enables the coating to cure rapidly through ultraviolet irradiation, improving production efficiency and product performance.

5. Post-processing

Slitting and rewinding: The PET thermal matte silver paper after drying and curing needs to be slitted and rewinding to meet the needs of different specifications and sizes.

Quality inspection: Quality inspection of finished products, including appearance inspection, print effect testing, physical performance testing, etc., to ensure product quality meets standards.

6. Other techniques

Environmental protection technology: With the enhancement of environmental protection awareness, more and more PET thermal matte silver paper manufacturers have begun to pay attention to the application of environmental protection technology. For example, adopting environmentally friendly coating formulations, reducing solvent use, and implementing waste recycling measures.

Intelligent production: Some leading enterprises have realized the intelligent production of PET thermal matte silver paper. Improve production efficiency and product quality stability through the introduction of automated production lines, intelligent control systems and iot technologies.

In summary, the current mainstream PET thermal matte silver paper production technology covers raw material treatment, coating formulation design, coating process, drying and curing, and post-treatment. The continuous innovation and optimization of these technologies will promote the PET thermal matte silver paper industry to develop in the direction of higher quality and higher efficiency.