How to control the color uniformity of matte silver in PET matte silver paper production?

In the production of PET matte silver paper, controlling the color uniformity of matte silver is a key link, which directly affects the final quality and market acceptance of the product. The following are some effective ways to control the color uniformity of dumb silver:

1. Selection and ratio of raw materials

Selection of PET film: Select a PET film with stable quality and smooth surface as the substrate to ensure its consistency and stability in subsequent processing.

Coating formulation: Precise control of the proportion of components in the coating, including matte silver powder, adhesives, solvents, etc. Ensure that the paint is evenly mixed, no particles, no precipitation, to reduce the possibility of uneven color.

2. Coating process control

Coater parameter adjustment: According to the width, thickness and coating characteristics of the PET film, adjust the speed, pressure, temperature and other parameters of the coater to ensure that the paint is evenly and stably coated on the PET film.

Coating thickness control: By adjusting the blade gap of the coating machine or the amount of coating, the thickness of the coating is controlled, so that the dumb silver powder is evenly distributed in the coating, and the phenomenon of local too thick or too thin is avoided.

3. Vacuum aluminum plating process

Aluminum plating machine parameter setting: In the process of vacuum aluminum plating, according to the characteristics of the coating and the required gloss, adjust the vacuum degree of the aluminum plating machine, evaporation source temperature, evaporation rate and other parameters to ensure uniform and dense aluminum plating layer.

Aluminum plating thickness monitoring: The thickness measuring instrument is used to regularly detect the thickness of the aluminum plating layer to ensure that it meets the product requirements and avoid color differences caused by uneven thickness.

4. Follow-up treatment and detection

Curing treatment: After the coating and aluminum plating is completed, the PET matte silver paper is cured to make the coating and aluminum plating layer more firmly bonded to the PET film, while improving the weather resistance and stability of the product.

Color detection: Use a professional color detection instrument to detect the color of PET dumb silver paper to ensure uniform and consistent color. For uneven color products, timely adjustment or elimination.

5. Quality control system

Establish a quality management system: Establish a sound quality control system, including raw material inspection, process control, finished product inspection and other links, to ensure that each production link meets the quality requirements.

Staff training: Strengthen the training of production staff, improve their awareness of product quality and control ability, reduce the problem of uneven color caused by human factors.

To sum up, controlling the color uniformity of matte silver in PET matte silver paper production needs to start from many aspects such as raw material selection and ratio, coating process control, vacuum aluminum plating process, follow-up treatment and detection, and quality control system. Through scientific management and strict control, PET matte silver paper products can be ensured uniform color and stable quality.