POM grades combine in coffee center

The EQ.7 fully automated coffee center from Siemens Electrogeräte GmbH relies on Hostaform polyacetal copolymer (POM) from Ticona Engineering Polymers (Kelsterbach, Germany) for several key mechanical components.

The lever arm is molded from grade C13031 to ensure the moving mechanism is suitably robust, the brewing unit is processed from media-grade MR130ACS to provide the housing with enhanced acid and chlorine stability (ACS), while the gearwheel is made of slip-optimized grade C9021 SW to reduce noise levels and keeps wear to a minimum.

Acid and chlorine stability of new POM grade suit it for use in coffee maker brewing unit.

Grade MR130ACS furnishes good chemical resistance at high temperatures and is the polymer of choice for potable water applications. It not only satisfies European Union food contact requirements but also European and U.S. criteria for end product potable water testing. The high chlorine stability of this grade is of particular interest to markets where chlorine content in potable water can be an issue.

Grade C9021 SW possesses good sliding friction properties. The tribologically optimized TF and SW grades offered by Ticona are especially quiet, which makes them highly suitable for gearwheels, bearings, sliding components and control elements. These grades are excellent sliding partners for metals and other plastics, reducing noise levels by up to half. —Stephen Moore