How is the adhesion of gold lacquer, and can it adhere firmly to the surface of various metal cans?

Publish Time: 2025-02-20

Gold lacquer, especially epoxy phenolic gold lacquer, is increasingly used in metal packaging fields such as beverage cans, food cans and hanging ears. Its excellent decorative effect and protective performance provide metal cans with a bright appearance and lasting protection. However, the adhesion of gold lacquer is a key link in its performance, which is directly related to whether gold lacquer can adhere firmly to the surface of various metal cans.

The adhesion of gold lacquer mainly depends on its formula, construction process and surface treatment of the metal can. High-quality epoxy phenolic gold lacquer usually contains special adhesion promoters, which can form chemical bonds with the metal surface, thereby enhancing the adhesion between gold lacquer and the metal can. In addition, the drying and curing process of gold lacquer also has an important influence on adhesion. The correct curing conditions can ensure that gold lacquer forms a dense paint film, further improving its adhesion and durability.

In terms of construction technology, the pretreatment of the metal tank surface is the key to the adhesion of gold lacquer. The metal surface must be clean, dry and free of pollutants such as oil, rust, etc. This is usually achieved through treatment methods such as sandblasting, pickling or phosphating. Only a fully pretreated metal surface can ensure that gold lacquer forms good adhesion with it.

In addition, the spraying technology of gold lacquer also has a certain impact on the adhesion. When spraying, the appropriate spray gun distance, spraying pressure and coating thickness should be maintained to ensure that gold lacquer can be evenly and densely attached to the surface of the metal tank. At the same time, avoid construction in adverse environments such as humidity, low temperature or high temperature, so as not to affect the drying and curing process of gold lacquer, thereby reducing its adhesion.

In actual applications, the adhesion of gold lacquer has been strictly tested and verified. Common test methods include cross-hatch method, peel test, etc. These tests can visually evaluate the adhesion strength between gold lacquer and metal cans, ensuring that gold lacquer will not fall off or peel off during long-term use and transportation.

In summary, the adhesion of gold lacquer is one of the key indicators of its performance. By optimizing the formula, improving the construction process, and strengthening the pretreatment of the metal can surface, the adhesion between gold lacquer and the metal can can be significantly improved, providing metal packaging with a long-lasting, bright decorative effect and protective performance.