FIELD: ventilation.
SUBSTANCE: invention relates to laminated membrane for use in central unit of ventilation system with energy recovery for exchange of heat and steam between two independent incoming and outgoing air flows without their mixing. Laminated fibrous membrane has microporous supporting substrate and film laminated on microporous supporting substrate. Film composition contains sulphonated block-copolymer having at least one end block A and at least one inner block B, where each block A essentially does not contain sulphonic acid or sulphonic ester functional groups, and each block B is polymer block containing from approximately 10 to approximately 100 mol% of sulphonic acid or sulphonic ester functional groups depending on number of monomer links. Energy recovery system is also described, including multiple laminated membranes formed microporous fibrous supporting substrate and film, which contains sulphonated block-copolymer, laminated on microporous supporting substrate.
EFFECT: technical result is improved values of water vapour transfer rate, particularly higher than 96 %.
17 cl, 7 dwg, 2 tbl
