This method of metallizing is similar to evaporative coating in many ways. The main difference is the manner in which the metal is heated and transformed into metal vapor. A beam of high energy electrons is aimed at the source of metal. This energy causes the molecules to vaporize and form a cloud of metal gas. The metal gas bond to the film as it cools. The temperatures obtained on the surface of the metal during this process are much higher than the other methods of coating. Many exotic and precious metals can be coated in this manner.
Electron beam films have higher water vapor transmission rates than sputter coated films. This allows the films to dry much more quickly, especially in high humidity areas. Benefits of electron beam films include high light transmission, low visible light reflection, high solar heat rejection and reduced “hazing” or “fogging” during the curing period that often occurs with sputter coated films. |