FIELD: physics.
SUBSTANCE: invention relates to a filament for a filter for extracting a taste-pleasant beverage and a woven material for a filter for extracting a taste-satisfying beverage containing such a filament. Filament for producing a filter for extracting a taste-friendly beverage, demonstrating improved safety for the environment, capable of preserving strength of the fabric and characterized by improved formability, and woven material made from such filament. Core-shell type bicomponent filament for a filter for extracting a taste-pleasant beverage in which the core component is a homopolyester, characterized by a melting point of 220 °C or more, coating component is a copolyester containing terephthalic acid and diol as main components and characterized by a melting point of at least 40 °C lower than corresponding temperature of core component, wherein the weight change after boiling in an aqueous solution of ethanol at concentration of 10 wt. % for 1 hour is 4 % or less, and the eluated amount of heavy metals is less than 0.1 ppm.
EFFECT: technical result is to provide a filament for producing a filter for extracting a taste-pleasant beverage, demonstrating improved safety for environment, capable of maintaining strength of fabric and characterized by improved formability, and woven material made from such filament.
8 cl, 6 ex, 1 tbl
