What Are The Quality Requirements For The Appearance Of Aluminum-plastic Panels

The appearance quality is the first impression given by aluminum-plastic panel products. At the end of the 20th century, due to the inadequacy of the production process of aluminum-plastic panels, the surface quality of many panels was unsatisfactory. Wavy ruffles and pulls often appeared. Defects such as tendons, missing coatings, dark lines, scalds, obvious color difference, blistering, gumming, etc. Now the situation has changed a lot. Most domestic manufacturers of aluminum-plastic composite panels have done a better job. Some excellent domestic brands have the same quality as well-known foreign aluminum-plastic composite brands. It is difficult to distinguish which one is domestic based on appearance. Board, which is the imported board.

However, in general, there is still a certain gap between the texture of domestically produced boards and internationally renowned brands. According to the actual situation in China, although there are sometimes some differences in appearance, other physical and mechanical properties are not bad, in general it does not affect the use of the product, in order to reduce unnecessary waste, and to distinguish the grade of the product, so in In terms of appearance quality, the aluminum plastic board is required to be classified into two grades: excellent and qualified products.

Generally, the aluminum-plastic board should be neat and clean, and the surface coating should be free of leakage coating. When trimming the aluminum-plastic composite board, the edges that are difficult to guarantee quality should be cut off, that is, no plastic should be exposed on the front and back of the aluminum-plastic composite board. Because the aluminum-plastic composite board is a decorative material, the aluminum-plastic board should be properly protected, and the decorative surface should not have obvious marks, indentations, unevenness and other traces, and damage through the thickness of the coating.

What are the quality requirements for the appearance of aluminum-plastic panels

Similar to JG/T3035-1996 "Building Curtain Wall" standard for the appearance quality requirements of metal curtain wall panels. The following lists some typical and common defects and limit values of some aluminum-plastic composite boards.

ripple

The requirements for superior products are not allowed, and the requirements for qualified products are not obvious.

Bubbling

Defects shall not exceed 10mm, superior products shall not be allowed, and qualified products shall not exceed 1 per square meter.

Flaw

Defects shall not exceed 3mm, superior products shall not exceed 3 per square meter, and qualified products shall not exceed 10.

Scratch

Defects are stipulated as the total length. Premium products are not allowed to appear, and qualified products do not exceed 100mm/square meter.

Bruise

The authority is stipulated as the total area, premium products are not allowed to appear, and qualified products are not more than 300mm2/m2.

Total scratches and scrapes

Premium products are not allowed to appear

Color difference

Color difference is not obvious; if measured together △E≤2

However, the list of defects cannot be all-encompassing, and unexpected and unpredictable defects may appear. Therefore, the requirements for the appearance quality of aluminum-plastic panels should be based on the principle of not affecting the use of products and meeting the legitimate requirements of users.