What are the steps involved in the production process of PET silver paper?

The production process of PET silver paper (also known as matte silver label paper) mainly includes the following steps:

1. Raw material preparation:

The main raw material is polyethylene terephthalate (PET), as well as other auxiliary materials such as deionized water, defoamers, high-temperature alumina, dispersants, and preservatives (used in the production of matte PET silver coating films).

Ensure the quality and supply stability of raw materials to meet production needs.

2. PET sheet production:

Raw material crystallization: Heat and crystallize amorphous PET slices, control the temperature to arrange the molecules in a regular manner, increase the glass transition temperature of the granules, and prevent adhesion and blockage of the hopper during the drying process of the granules.

Drying: Use a dehumidifier to dry PET slices, reducing the moisture content to below 0.005% to prevent hydrolysis and degradation.

Extrusion molding: The dried PET slices are fed into an extruder, where the material is plasticized into a viscous state through heating, conveying, and extrusion, and then fed into a sheet machine head for extrusion into sheets.

Pressing and shaping: The sheet is pressed and shaped by temperature control and compression of the roller.

3. Coating and processing:

Coating: According to customer requirements, apply a special coating on the surface of PET sheet, which may contain a matting agent (such as high-temperature alumina) to form a matte silver effect.

Processing: Perform necessary processing on the coated PET sheet, such as cutting, slitting, etc., to meet the needs of subsequent use and processing.

4. Quality inspection and packaging:

Quality inspection: Conduct quality inspection on the produced PET silver paper, including checking clarity, color, flatness, firmness, etc.

Packaging and Storage: Pack qualified PET silver paper and label and store it according to customer requirements.

5. Environmental protection and safety production:

Throughout the entire production process, it is necessary to closely monitor environmental protection and safety production issues.

Comply with relevant environmental regulations and safety rules to ensure the environmental friendliness and safety of the production process.

It should be noted that the production process of PET silver paper may vary depending on different manufacturers, equipment, and formulations. Therefore, in the actual production process, adjustments and optimizations need to be made according to specific circumstances.

In addition, with the continuous advancement of technology and changes in market demand, the production process of PET silver paper is also constantly innovating and improving. For example, some advanced coating technologies and processing equipment are applied in the production process to improve the quality and performance of PET silver paper. At the same time, some environmentally friendly and energy-saving production processes have been widely promoted and applied to reduce energy consumption and emissions during the production process.