Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly unreacted thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride.
PVDF is a special plastic used in applications that require the highest purity, as well as resistance to solvents, acids and bases. Compared to other fluoropolymers, such as polytetrafluoroethylene (Teflon), PVDF has a low density (1.78 g / cm 3).
It is available as piping products, sheets, tubes, films, sheets and an insulator for high end wires. It can be injected, cast or welded and commonly used in the chemical, semiconductor, medical and defense industries, as well as in lithium-ion batteries. It is also available as a cross-link closing foam, which is used increasingly in aerospace and aerospace applications. It can also be used in repeated exposure to food products, as it is FDA compliant and completely non-toxic.
As a fine powder, it is an ingredient in high grade paints for metals. These PVDF grades have excellent gloss and color retention. They are used on many well-known buildings around the world, such as the Petronas Twin Towers in Malaysia and Taipei 101 in Taiwan, as well as on commercial and residential metal roofing.
PVDF films are used in western blots to stabilize proteins, due to its non-specific affinity for amino acids.
PVDF is also used as a binder component for carbon electrodes in supercapacitors and for other electrochemical applications.
Accordingly, the building and building materials industry, aluminum color before the race on the market has diversified and improved products to use for many different categories of works from the Walls, walls, roofs to the decorative items advertising fine art.
As a protective coating for the building’s surface, color-coated aluminum requires a high durability and good environmental resistance, especially in the marine environment. The decisive factor in quality, besides the basic components is high quality aluminum and durability, also depends on the surface paint must be strong protection, good corrosion resistance and color fastness , resistance to chemical changes in weather and environmental pollution.
Coating is a surface element that interacts directly with external agents, so the coating system plays an extremely important role in protecting the interior layer from the harsh tropical weather conditions. To ensure the role of coating, high quality paint for aluminum must ensure against the phenomenon of cracking paint, fading paint as is commonly seen in hot and severe Asian countries.
In the face of ever-increasing climate change, external agents from the environment include hot sun, ultraviolet rays, dirt, acid rain, and a host of other causes of pollution. cause. Coating now serves as a shield for the aluminum layer as well as the beauty of the work before the corrosive agent of the environment. Without good protection, these agents will gradually attack the paint, eventually damaging the entire structure of the aluminum layer.
“PVDF is the exclusive top coat for aluminum with an outdoor warranty of 10 to 20 years”
For color-coated aluminum for civil and industrial applications, market requirements for coating systems vary from acrylic or polyester to super polyester and high quality coatings. PVDF. The variety of types and quality of coatings makes the aluminum plating market shaping many quality segments from low to high.
According to Nguyen Dinh Long, Director of PPG Vietnam Paint Company – the world famous paint company and achieved high turnover – shared: “PVDF coating system is considered as the leading paint technology and is the system. The coating is very good for aluminum coating at the present time because of the outstanding features of aluminum surface protection against corrosive agents of the environment. “
However, not all PVDF paint systems on the market today are guaranteed the same quality. According to Long, in the world today only PVDF coatings conform to the exclusive registration formula Kynar 500® or Hylar 5000® to ensure superior quality to meet the AAMA 2605 high technical standards of the Association of American Architectural Manufacturers Association – one of the leading architectural standards in the world. Specifically, the DURANAR® coating system is a combination of PPG’s unique pigment and resin technology with 70% of the special fluoropolymer content of the Kynar 500® or Hylar 5000® PVDF. This is the optimum ratio in the PVDF coating formula. “
“Unlike other color-coated aluminum technologies, DURANAR® is a chemical inert system that provides a color fastness and excellent gloss retention as well as reduced environmental impact. acid rain; Attack of the