Specialized elastomeric compounds continue to penetrate applications that improve quality of potable water supplies. EMME GI PLAST (Miasino, Italy) is using a range of thermoplastics elastomers (TPEs) that are specially formulated by Kraiburg (Waldkraiburg, Germany) for use in drinking water to maintain its pure taste and remove pathogens.
Faucets or shower heads are protected from contaminants that can be formed when particles are separated in the pipe and clog the aerator through use of a filter specifically designed for the job. The filter is manufactured by EMME GI PLAST has an O-ring made of TPE of the DW series. It is used directly on the screw joint between the water pipe and the water connection.
“Our filter provides the faucet components with optimal protection from water pipe contaminants. In this sensitive environment, we need a material for the O-ring of our filter that itself stands up to the strictest drinking water regulations,” says an official of EMME GI PLAST. The specific material used is Thermolast K. DW series compounds comply with water certifications such as the DVGW W270 in natural and color and the German KTW certification, and the British WRAS for cold and hot water.
These thermoplastic elastomers also meet the standards of France’s ACS certification. A Kraiburg press release states: “The success of the DW series for drinking water applications lies within its unique formulation. The growth of mold and bacteria is inhibited without the addition of irritating or even poisonous chemicals.” DW series compounds are available from 55 Shore A, and they comply with drinking water standards even when colored.
Source: http://www.plasticstoday.com/articles/tpe-kills-pathogens-without-toxins0328201301
