| abstract |
The present invention relates to a preparing device ( 1 ) for preparing an aqueous beverage by means of a beverage ingredient. The preparing device ( 1 ) comprises: an outflow nozzle ( 33 ) for dispensing prepared beverage; a preparation chamber ( 13, 16, 14 ) for at least partially preparing the beverage; a supply ( 12 ) line ending in the preparation chamber for the supply of water to the preparation chamber; an ingredient-dispensing system ( 7 ) for delivering the beverage ingredient to the preparation chamber; and an outflow path ( 36, 33 ) which extends from the preparation chamber to the outflow nozzle. The outflow nozzle ( 33 ) and/or the preparation chamber ( 13, 16, 14 ) and/or the outflow path ( 33, 36 ) are entirely or partly made from a polymer mixture which comprises (a) a self-lubricating, hydrophobic polymer or copolymer having a moisture absorption, determined in accordance with ASTM D 570 at a relative humidity of 50% and a temperature of 23° C., of less than 1% and (b) a homopolymer or a copolymer of a fluorinated ethylene. |