Aluminium coating common problems and analysis

1. Scratch.

Coating layer abrasion: after the appearance of aluminum plating surface uneven, there are obvious scratches, with through gelatin belt or yellow tape pulled down, disappeared on the substrate film.

Aluminum plating surface scratch: obvious scratches, visible to the light line shape, with transparent tape or yellow tape down, disappeared on the base film. Reason: there is a foreign body in the gap between the baffle plate; Guide roller dry, bearing is not flexible, stall.

Base film back scratch: coating aluminum plating process can lead to the occurrence of this phenomenon, the appearance of long and short scratches, or linear or planar, with regular and irregular, aluminum plating process the cause of this problem: water cooling roller has foreign matter sticking to its surface or uneven; Other reasons as above.

2. Empty wire plating.

Minor keys empty line is a line of light white lines, or oblique, or longitudinal, serious general performance for the two (multiple) white lines parallel or oblique or vertical, the essence of which is the base film in each part of the winding system was not well flattened, its influence factors are: the factors such as membrane material, deformation, recycling, roller winding system, the parallelism between the bending Angle, the tension adjustment and so on various factors. In the production process, the bending roller (also known as the banana roller) has the greatest influence. The Angle, arch height and width of the bending roller will have a great influence on the empty plating line.

3. The light hole.

To the light as small particles white point, the reason: evaporation temperature is too high or too low; Liquid aluminum spilt to the copper joint cause evaporation boat short circuit (often said that the aluminum tube is connected to electricity); Surface temperature instability of evaporator (related to mass of evaporator).

4. Take.

Performance for a prominent point outwards, there are large and small, the reason: coating residual material inclusion in its; Splash aluminum; The evaporation environment is unsanitary (mainly manifested as the sanitary conditions of vacuum chamber, winding car and water-cooling roller baffle).

5. Uneven layers.

When facing the light, the thickness of aluminum layer varies in the same section, thus affecting the transparency of the film. Local vacuum is affected; Installation of evaporator not in place; The aluminum wire is stuck and the aluminum delivery is uneven.

6. Become warped edge.

The performance of aluminum plating film edge layer upon layer up, the film edge deformation, serious cause aluminum and elastic edge, cause: tension is too large; There is material slag on both sides of the membrane.

7. To crinkle.

There are two forms of expression: living wrinkles and dead wrinkles. Wrinkle form in the next process can be flattened; Death wrinkle can not, death wrinkle is caused by elastic edge or winding uneven, the reason: the underlying membrane is stretched; The tracking arm is not parallel to the rewinding; Part of the right wrinkle by the winding deviation and loose and tight.

8. Critical reinforcement.

Performance for the surface is not level, showing a line, striking the membrane, can obviously feel the tension, the reason: winding tension is too large.

9. Aluminum.

Show as the aluminum layer of the point or line off, specific analysis is: the tension is too large, the film contains foreign matter, vacuum degree is not enough.

10. Aluminum layer is easy to fall off.

The main reason is that the aluminum layer and the base film adhesion is poor, the base film moisture is too high or have a volatile component. Measures taken: surface treatment of the base film, the base film drying treatment.