Glass coated packaging film

In order to meet the needs of the market, more and more customers of glass containers have put forward requirements for multi-variety, multi-function, and small-batch requirements on the colors, shapes, and labels of containers, such as the color of the containers, and they are required to show the difference in appearance. , can prevent the damage of ultraviolet rays to the content. The color of a beer bottle is brown, green, or even black. The purpose of the beer bottle is to both shield ultraviolet rays and achieve a differentiated appearance.
However, in the production process of glass containers, the deployment of a color is more complicated, and two kinds of waste glass with mixed colors are not easy to recycle. Therefore, glass manufacturers always want to reduce the color of glass.
To achieve this goal, a coated glass container coated with a polymer film on the surface of a glass container has been developed. The film can be made into a variety of colors and appearances, such as glass-like shapes, which can minimize the variety of colors of the glass. If a polymer film that absorbs ultraviolet light is applied, the glass container can be made colorless and transparent, and the advantages of the contents can be clearly seen.
The thickness of the polymeric coating film is generally 5-20 μm, which does not affect the recycling of the glass container after it is discarded. Because the color of the glass container is determined by the color of the film, even if the various pieces of glass are mixed together, it will not hinder the recycling. Therefore, the recycling efficiency can be greatly improved, which is very favorable to the protection of the environment.
The coated thin film glass container also has the following advantages: It can prevent the damage of the surface of the glass bottle due to collision, friction and the like between the containers, and can cover the original minor flaws of the glass container and increase the pressure resistance of the container by more than 40%.
Through the simulated crash damage test on the filling production line, it can be safely used on a production line with 1000 bottles per hour. In particular, due to the cushioning action of the film on its surface, the impact resistance of the glass container during transportation or filling movement is greatly improved. It can be considered that the popularization and application of the coating film technology, coupled with the lightweight design of the bottle body, will be an important means for expanding the market demand for glass containers in the future.
For example, Japan's Yamamura Glass Co., Ltd. developed and produced a coated glass container with a glassy appearance in 1998. It was alkali-resistant (70°C, 3% alkaline solution soaked for more than 1 hour), weather resistance (continuous in outdoor 60 hours exposure), damage peeling (simulation run on filling line for 10 minutes) test and UV transmittance test. The results show that the coated film is in good condition.