The Definition of Expanded PTFE

Update:29 Aug 2017
Summary:

The polytetrafluoroethylene film was found in 1938, an […]

The polytetrafluoroethylene film was found in 1938, an employee of dupont, an American chemical manufacturer, stumbled upon polytetrafluoroethylene or polytetrafluoroethylene. This thermoplastic polymer has unique properties that can resist friction, temperature, chemical degradation, mechanical action and electrical charge.

Today, PTFE technology can be used in a wide range of applications, from high-tech aerospace campaigns to dry film lubricants to nonstick surfaces. Other applications including use in mobile machinery self-lubrication of PTFE, high-performance thin film, resistance to environmental hazard protective fabrics, such as chemical and microbial attack) medical equipment and filter material (media).

For decades, PTFE has been used as a fabric, as a needle felt material has been used in various filtering applications, especially those involving an aggressive chemical environment. These filters are used in liquid applications and dry dust applications, and this is the dry dust solution of the expanded PTFE (ePTFE) we will discuss in this article.

EPTFE for film/membrane forms, in all the industrial type of filtration solutions, including food and packaging, pharmaceutical, minerals, power generation, metal, chemical industry, engineering and technology, such as aeronautics and astronautics. EPTFE membranes are pressed onto a variety of substrate materials such as polyester felt and woven fiberglass filters, as well as foldable materials for filter boxes and elements such as polyester and cellulose. As a kind of stable base film and substrate material, the substrate depends on the specific application requirements of the filter.

When considering its grinding potential, the shape of the dust, rather than its size, is a key factor. Angular particles found in cement, despite their small size, have greater grinding potential. The speed of air flow, the filter and the design of pipeline are all important factors, which ensure that the service life of the filter is not significantly reduced due to degradation.

Under the conditions of extreme temperature, the expanded PTFE medium has a strong thermal resistance between + 260-260 degrees Celsius and is stable in this range.