| dc.description.abstract | Volatile Organic Compounds, VOCs, are environmental source of pollution, which mainly emitted by using solvent in industry of painting. Nowadays, the workplace of painting is most in atmosphere, if we exposure in this place, it may damage the human body.
In order to reduce the solvent used in painting, in other words, reduce the contact with VOCs, this study established a vacuum polymer coating system to improve the spraying environment and use solvent-free coatings to move the process of industrial coating in the atmosphere to vacuum. Recycling and exhausting systems are established in the vacuum chamber to reduce the possibility of contact with the human body; Using UV-curable materials, it is desirable to achieve a solvent-free UV-curing solution, reducing the viscosity use in a vacuum spray system, atomizing by pressure , achieving a coating effect with a minimum spray amount and rapidly curing into a film. Complete the sample and establish the process of the vacuum spray system.
The study began with improvements in the materials and environment in the coating industry. The research will discuss in two parts: Part of the material: monomer trifunctional and monomer difunctional. The UV curing solutions formulated in a solvent-free form; the sprayed part has an experimental vacuum of 2×10-2 torr, and the coating material sprayed with a nozzle by a pressure. The substrate cosmetic bottle be coated into a liquid film, and then uses a high-speed camera observe the distribution of the spray during the spraying process. Thereafter, the liquid film irradiated by UV lamp formed a UV curing film.
This experiment compares the effects of different viscosity on adhesion and atomization, and UV curing film formation, observes the atomization phenomenon, solves the film formation problem, and successfully produces a film with a smooth and non-porous film surface. In the heat curing and UV process on the market, there are lower temperature and less energy consumption. The UV illumination time of the coating is 50 seconds, the hardness can reach 6H or more, and the adhesion is the highest level of 5B, which is friendly environment and high. Efficiency (no solvent), low VOCs emissions process. | en_US |